Slavchev, M., Tzankov, N., Popgeorgiev, G., 2013. Impact of fires on the spatial distribution patterns of the Hermann’s Tortoise (Testudo hermanni). — International Conference ‘Bioscience — development and new opportunities’ — Kliment’s days, Faculty of Biology, Sofia University ‘St. Kliment Ohridski’, 20th — 22nd November 2013.
Popgeorgiev, G. S., Tzankov, N. D., 2013. The effects of fires of different ages on the demographic structure of a population of Hermann’s (Testudo hermanni boettgeri Mojsisovics, 1889) and Spur-thighed (Testudo graeca ibera Pallas, 1814) tortoises in Eastern Rhodopes Mountains, Bulgaria. — International workshop on the management and restoration of Hermann’s tortoise populations and habitats. Abstracts, Le Luc-en-Provence (France), 18, 19 & 20 septembre 2013: 10.
Natchev, N., Kornilev, Y., Popgeorgiev, G., Tzankov, N., 2013. Considerations on the potential conflicts between some invasive American aquatic turtles and native Emys orbicularis — analysis of the feeding behaviour. — 4th ESENIAS (South and East European Network on Invasive Alien Species) workshop: International Workshop on IAS in Agricultural and Non-Agricultural Areas in ESENIAS Region, 16—17 December 2013, Çanakkale Onsekiz Mart University, Çanakkale, Turkey, 18.
Lukanov S., Simeonovska-Nikolova, D., Tzankov, N., 2013. Behavioural response of the marsh frog Pelophylax ridibundus to anthropogenic noise. — International Conference ‘Bioscience — development and new opportunities’ — Kliment’s days, Faculty of Biology, Sofia University ‘St. Kliment Ohridski’, 20th — 22nd November 2013.
Jablonski, D., Džukić, G., Jandzik, D., Jelić, D., Ljubisavljević, K., Mikulíček, P., Moravec, J., Tzankov, N., Gvoždík, V., 2013. Mitochondrial DNA diversity and haplotype distribution of slow worms (Anguis spp.) in the Balkans. — 91—92. In: Bryja, J., Řekáh, Z., Zukal, J. (eds): Zoloogické dny Brno 2013. Sborník abstraktů z konference 7.—8. února 2013. 283 pp.
Jablonski, D., Dzukic, G., Jandzik, D., Jelic, D., Ljubisavljevic, K., Mikulicek, P., Moravec, J., Tzankov, N., Gvoždik, V., 2013. Mitochondrial phylogeography of three species of slow worms (Anguis) in the Balkans. — 17th European Congress of Herpetology, Programm & Abstracts, Veszprém (Hungary), 22—27 August 2013: 243.
Ivanchev, I. E., Tzankov, N. D., 2013. Activities for tortoises’ conservation in Bulgaria. — International workshop on the management and restoration of Hermann’s tortoise populations and habitats. Abstracts, Le Luc-en-Provence (France), 18, 19 & 20 septembre 2013: 34.
Grozdanov, A., Tzankov, N., 2013. Analysis and comparison of sexual size dimorphism in two lacertid lizards in Bulgaria. — International Conference ‘Bioscience — development and new opportunities’ — Kliment’s days, Faculty of Biology, Sofia University ‘St. Kliment Ohridski’, 20th — 22nd November 2013.
Попова, С., Цанков, Н., Грозданов, А., 2013. Тенденции в промяната на площите на пригодните местообитания на ливадния Lacerta agilis chersonensis в Софийската котловина. — Студентска научна конференция ‘Екология и околна среда’ 1 март 2013, сборник с резюмета: 26—27.
Дюгмеджиев, А., Стоянов, А., Цанков, Н., 2013. Някои аспекти от екологията и биологията на женските усойници (Vipera berus bonsiensis) на Витоша. — Студентска научна конференция ‘Екология и околна среда’ 1 март 2013, сборник с резюмета: 27—28.
Вергилов, В., Цанков, Н., Христов, Г., 2013. Данни за биологията и екологията на късокракия гущер (Ablepharus kitaibelii) в България. — Студентска научна конференция ‘Екология и околна среда’ 1 март 2013, сборник с резюмета: 30—31.
Андонов, К., Цанков, Н., 2013. Пространствени ниши и заплахи при земноводни и влечуги в югозападен Пирин. — Студентска научна конференция ‘Екология и околна среда’ 1 март 2013, сборник с резюмета: 29—30.
Vergilov, V., Tzankov, N., 2012. Influence of environmental factors over morphology of snake eyed skink Ablepharus kitaibelii (Bibron & Bory de Saint-Vincent, 1833) (Squamata: Sauria: Scincidae). — Youth Scientific Conference ‘Kliment’s days’ 22—23 November, 2012, 3: 16.
Slavchev, М., Tzankov, N., Popgeorgiev, G., 2012. Species diversity in relation to habitats diversity. — Youth Scientific Conference ‘Kliment’s days’ 22—23 November, 2012, 3: 20.
Lukanov, S., Tzankov, N., Simeonovska-Nikolova, D., 2012. A comparative study of the mating call of the marsh frog Pelophylax ridibundus (Pallas 1771) in Bulgaria. — Annual Zoological Congress of ‘Grigore Antipa’ Museum, 22—23 november, 2012, book of abstracts: 181.
Lukanov, S., Tzankov, N., Simeonovska-Nikolova, D., 2012. A comparative study of the mating call of the marsh frog Pelophylax ridibundus (Pallas 1771) in Bulgaria. — Annual Zoological Congress of ‘Grigore Antipa’ Museum, 22—23 November, 2012, Book of Abstracts: 181. ISBN: 978-606-92462-7-6.
Jablonski, D., Džukić, G., Jandzik, D., Jelić, D., Ljubisavljević, K., Mikulíček, P., Moravec, J., Tzankov, N., Gvoždík, V., 2012. Diversity and distribution of slow worms (Anguis spp.) in the Balkans as inferred from mitochondrial DNA. — 27 konference ČHS (27th Conference of the CHS), Herpetologické informace, Časopis Česká herpetologická společnost (The journal of the Czech Herpetological Society), KR print, s.r.o., Praha, 11 (1): 8—9.
Grozdanov, A., Tzankov, N., Popova, S., 2012. Microhabitat selection between sex and age classes in Lacerta agilis chersonensis Adrejowski, 1832 (Squamata: Sauria: Lacertidae). — Youth Scientific Conference ‘Kliment’s days’ 22—23 November, 2012, 3: 5.
Tzankov, N., Stoyanov, A., 2011. Northern Crested Newt Triturus cristatus (Laurenti, 1768). — In: Golemanski, V. (editor-in-chief), 2011. Red Data book of the Republic of Bulgaria. Volume 2. Animals. IBER-BAS & MOEW, Sofia (online edition).
Tzankov, N., Grozdanov, A., Peshev, D., Vasilev, A., 2011. Vertical distribution of the amphibians and reptiles in Rilska river basin (Rila Mt., Soutwest Bulgaria). — Annuaire de l’Université de Sofia ‘St. Kliment Ohridski’, livre 1 — zoology, 99: 103—110.
Tzankov, N., 2011. Snake-eyed Lizard Ophisops elegans (Menetries, 1832) ssp. macrodactylus Berthold, 1932. — In: Golemanski, V. (editor-in-chief), 2011. Red Data book of the Republic of Bulgaria. Volume 2. Animals. IBER-BAS & MOEW, Sofia (online edition).
Tzankov, N., 2011. European Glass Lizard Pseudopus apodus (Pallas, 1775) ssp. thracius (Obst, 1978). — In: Golemanski, V. (editor-in-chief), 2011. Red Data book of the Republic of Bulgaria. Volume 2. Animals. IBER-BAS & MOEW, Sofia (online edition).
Stoyanov, A., Tzankov, N., Naumov, B., 2011. Die Amphiben und Reptilien Bulgariens. — Chimaira, Frankfurt am Main, 588 pp.
Naumov, B., Tzankov, N., Popgeorgiev, G., Stoyanov, A., Kornilev, Y., 2011. The Dice snake (Natrix tessellata) in Bulgaria: a contribution to the morphology and chorology. — Mertensiella, 18: 288—298.
Natchev, N., Tzankov, N., Gemel, R., 2011. Green frog invasion in the Black Sea: habitat ecology of the Pelophylax esculentus complex (Anura, Amphibia) population in the region of Shablenska Тuzla lagoon in Bulgaria. — Herpetology Notes, 4: 347—351.
Milchev, B., Chobanov, D., Tzankov, N., 2011. The diet of a Lesser Spotted Eagle Aquila pomarina family in Southeast Bulgaria. — Acrocephalus, 31 (145/146): 143—145.
Lukanov, S., Simeonovska-Nikolova, D., Tzankov, N., 2011. Habitat distribution and vocal activity of the marsh frog (Pelophylax ridibundus), the European green toad (Pseudepidalea viridis) and the eastern spadfoot (Pelobates syriacus) (Anura: Ranidae, Bufonidae, Pelobatidae) in the protected area of Rupite. — Science & Technologies, Natural & Mathematical science 1 (3): 16—20.
Lukanov, S., Simeonovska-Nikolova, D., Tzankov, N., 2011. Call types of the marsh frog Pelophylax ridibundus Pallas, 1771 (Amphibia: Anura: Ranidae) in Bulgaria. — Youth Scientific Conference ‘Kliment’s days’ 22—23 November, 2011, 2: 69—72.
Grozdanov, A., Tzankov, N., Peshev, D., 2011. Thermal ecology of the lowland subspecies of Sand lizard Lacerta agilis chersonensis Adrejowski, 1832 (Squamata: Lacertidae) in Bulgaria. — Youth Scientific Conference ‘Kliment’s days’ 22—23 November, 2011, 2: 81—83.
Цанков, Н., Попгеоргиев, Г., 2011. Земноводните и влечугите в Източните Родопи. — В: Корнилев, Ю. (ред.), Издателство Ето, София, 64 с.
Westerstom, A., Petrov, B., Tzankov, N., 2010. Envenoming following bites by the Balkan adder Vipera berus bosniensis — First documented case series from Bulgaria. — Toxicon, 56: 1510—1515.
Tzankov, N., 2010. Preliminary results about the morphology of the low altitude, melanistic Vipera berus specimens from north east Bulgaria. — 52—53 p. — Marco A. L. Zuffi (ed.) 3rd Biology of the Vipers Conference — Calci, Pisa, 31st March—2nd April 2010. Museum Natural History and Territory, University of Pisa, Italy. 63 pp.
Popgeorgiev, G., Tzankov, N., Naumov, B., Kornilev, Y. V., Stojanov, A., 2010. Species diversity of amphibians and reptilians in the special protected area ‘Ponor’. — 122 p. Northwestern Bulgaria. Annual zoological congress of ‘Grigore Antipa’ Museum, 17—19 November 2010, Bucharest — Romania, 132 pp.
Popgeorgiev, G., Tzankov, N., Kornilev, Y. V., Naumov, B., Stojanov, A., 2010. Species diversity of amphibians and reptiles in the special protected area ‘Besaparski Ridove’, southern Bulgaria. — Biotechnology & Biotechnological Equipment, special edition (Second Balkan conference of biology 21—23 may 2010, Plovdiv, 50 years university of Plovdiv), 24: 661—666. [PDF]
Naumov, B., Tzankov, N., Stojanov, A., Popgeorgiev, G., 2010. Amphibians of lower Danube (Bulgaria) — distribution and cvonservation. — Научна конференция ‘биологично разнообразие и жизнена среда’, 24—25 юни 2010 г. Софийски университет ‘Св. Климент Охридски’, под патронажа на Министъра на околната среда и водите на Република България.
Mollov, I., Popgeorgiev, G. S., Naumov, B. Y., Tzankov, N. D., Stoyanov, A. Y., 2010. Cases of abnormal amplexus in anurans (Amphibia: Anura) from Bulgaria and Greece. — Bihariean Biologist, 4 (2): 121—125.
Kornilev, Y., Tzankov, N., Popgeorgiev, G., 2010. Modeling the distribution of Vipera ammodytes and V. berus in Bulgaria using ecological modeling techniques and GIS. — 43—44 pp. — Marco A. L. Zuffi (Editor). — 3rd Biology of the Vipers Conference — Calci, Pisa, 31st March—2nd April 2010. Museum Natural History and Territory, University of Pisa, Italy. 63 pp.
Tzankov, N., Stojanov, A., 2009. The European pond turtle in Bulgaria. — In: Rogner, M. (ed.), European pond turtle Emys orbicularis. Chelonian library, Edition Chimaira, Frankfurt am Main, Germany, 216—218.
Tzankov, N., Petrov, V., 2009. Nose—horned viper Vipera ammodytes (Linnaeus, 1758) with atypical characters from western Bulgaria. — Biotechnology & Biotechnological Equipment, XI Anniversary scientific conference 120 years of academic education in biology 45 years faculty of biology, Special Edition, 23 (2): 141—142.
Tzankov, N., Naumov, B., Grozdanov, A., Peshev, D., Vasilev, A., 2009. The herpetofauna of northern Black sea coast. — XI anniversary scientific conference with international attendance, 120 years of academic education in biology, 45 years Faculty of Biology, ‘Biology—traditions and challenses’, May 27—29, 2009, Sofia University ‘St. Kliment Ohridski’, Faculty of Biology, Ministry of agiculture and foods, Agricultural academy, Adrobio institute, Sofia, 2009.
Tzankov, N., Naumov, B., Grozdanov, A., 2009. New data for the vertical distrbution of the smooth newt (Lissotriton vulgaris) (Amphibia, Salamandridae) in Bulgaria. — XI anniversary scientific conference with international attendance, 120 years of academic education in biology, 45 years faculty of biology, ‘biology—traditions and challenses’, May 27—29, 2009, Sofia University ‘St. Kliment Ohridski’, Faculty of biology, Ministry of agiculture and foods, Agricultural academy, Adrobio institute, Sofia, 2009.
Tzankov, N., Naumov, B., Grozdanov, A., 2009. New data for the vertical distrbution of the smooth newt (Lissotriton vulgaris) (Amphibia, Salamandridae) in Bulgaria. — Biotechnology & Biotechnological Equipment, XI Anniversary scientific conference 120 years of academic education in biology 45 years faculty of biology, Special Edition, 23 (2): 121—122.
Stojanov, A., Tzankov, N., 2009. Ein ungeklärtes Soazialverhalten beim Grasfrosch (Rana temporaria, Linnaeus 1758) in Bulgarien. — ÖGH — Aktuell, 22: 11—13.
Petrov, V., Tzankov, N., 2009. Nose-horned viper Vipera ammodytes (Linnaeus, 1758) with atypical characters from western Bulgaria. — XI anniversary scientific conference with international attendance, 120 years of academic education in biology, 45 years faculty of biology, ‘biology—traditions and challenses’, May 27—29, 2009, Sofia University ‘St. Kliment Ohridski’, Faculty of biology, Ministry of agiculture and foods, Agricultural academy, Adrobio institute, Sofia, 2009.
Naumov, B., Tzankov, N., 2009. Sexual size dimorphism in genus Triturus Rafinesque, 1815 (Amphibia: Salamandridae) in Bulgaria — preliminary results. — Biotechnology & Biotechnological Equipment, XI Anniversary scientific conference 120 years of academic education in biology 45 years faculty of biology, Special Edition, 23 (2): 85—88.
Наумов, Б., Цанков, Н., Попгеоргиев, Г., Славчев, М., 2009. Нови данни за разпространението на род Triturus Rafinesque, 1815 (Amphibia: Salamandridae) в България. — Юбилейна научна конференция по повод ‘35 години обучение по Екология и опазване на околната среда’ при Лесотехническия университет. 12—13.06.2009 г.
Tzankov, N., Stoyanov, A., 2008. Triturus cristatus (Laurenti, 1768): a new species for Bulgaria from its southernmost known localities. — Salamandra, 44 (3): 153—162.
Naumov, B., Tzankov, N., 2008. First record of Triturus macedonicus (Laurenti,1768) (Amphibia: Salamandridae) in Bulgaria. — Historia naturalis bulgarica, 19: 111—114. [PDF] doi:10.5281/zenodo.4043717
Tzankov, N., Popgeorgiev, G., Mihov, S., 2007. Yellow-bellied Toad Bombina variegata (Linnaeus, 1758). — Species report. Wildlife and sustainable farming initiative, Initiative launched by the European Commission — DG ENV. Orbicon (Denmark), Écosphère (France), Atecma (Spain), Ecosystems LTD (Brussels). 46 pp.
Tzankov, N., 2007. Morphological variability of Podarcis muralis (Sauria: Lacertidae) in Bulgaria. — p. 309. 14th European Congress of Herpetology, Porto (Portugal), September 2007. Abstract Book. CIBIO, Campus Agrário de Vairão, Rua Padre Armando Quintas, 4485—661 Vairão, Portugal. Tipografia Camões. Póvoa de Varzim, Portugal. 340 pp.