Spassov, N., Hristova, L., Ivanova, S., Georgiev, I., 2017. First Record of the ‘Small Cave Bear’ in Bulgaria and taxonomic status of the bears of the Ursus savini Andrews — Ursus rossicus Borissiak group. — Fossil Imprint, 73 (3—4): 275—291.
Spassov, N., Böhme, M., Geraads, D., Kötter, S., Van Baak, C., 2017. Pikermian mammal event, post-Pikermian mammal turnover and appearance of Graecopithecus. — 5th Congress of the RCMNS. September 03—06.2017. Book of Abstracts, p. 21.
Ottoni, C., Van Neer, W., De Cupere, B., Daligault, J., Guimaraes, S., Peters, J., Spassov, N., Prendergast, M. E., Boivin, N., Morales-Muñiz, A., Bălăşescu, A., Becker, C., Benecke, N., Boroneant, A., Buitenhuis, H., Chahoud, J., Crowther, A., Llorente, L., Manaseryan, N., Monchot, H., Onar, V., Osypińska, M., Putelat, O., Quintana Morales, E. M., Studer, J., Wierer, U., Decorte, R., Grange, T., Geigl, E.-M., 2017. The palaeogenetics of cat dispersal in the ancient world. — Nature Ecology & Evolution, 1 (7): 1—7.
Mizumachi, K., Nishita, Y., Spassov, N., Raichev, E. G., Peeva, S., Kaneko, Y., Masuda, R., 2017. Molecular phylogenetic status of the Bulgarian marbled polecat (Vormela peregusna, Mustelidae, Carnivora), revealed by Y chromosomal genes and mitochondrial DNA sequences. — Biochemical Systematics and Ecology, 70: 99—107. https://doi.org/10.1016/j.bse.2016.10.025
Milchev, B., Spassov, N., 2017. First evidence for carrion—feeding of Eurasian Eagle-owl (Bubo bubo) in Bulgaria. — Ornis Hungarica, 25 (1): 58—69.
Li, Y., Spassov, N., 2017. A new species of Paramachaerodus (Mammalia, Carnivora, Felidae) from the late Miocene of China and Bulgaria, and revision of Promegantereon Kretzoi, 1938 and Paramachaerodus Pilgrim, 1913. — Paläontologische Zeitschrift, 3 (91): 409—426. https://doi.org/10.1007/s12542-017-0371-7
Гюрова, М., Иванова, С., Спасов, Н., Христова, Л., Попов, В., Маринова, Е., Бьоме, М., 2017. Проучване на пещерата Мишин камик — сезон 4. — Археологически открития и разкопки през 2016 г. БАН. Национален археологически институ с музей. София, с. 48—50.
Gurov, T., Atanassov, E., Karaivanova, A., Serbezov, R., Spassov, N., 2017. Statistical Estimation of Brown Bears (Ursus arctos L.) Population in the Rhodope mountains. — Procedia Computer Science 108C (2017): 2028—2037.
Fuss, J., Spassov, N., Begun, D., Böhme, M., 2017. Potential hominin affinities of Graecopithecus from the Late Miocene of Europe. — PlosOne, 12: e0177127.
Böhme, M., Spassov, N., Ebner, M., Geraads, D., Hristova, L., Kirscher, U., Kötter, S., Linnemann, U., Prieto, J., Roussiakis, S., Theodorou, G., Uhlig, G., Winklhofer, M., 2017. Messinian Age and savanna environment of the possible hominin Graecopithecus from SE Europe. — PlosOne, 12 (5): e0177347. https://doi.org/10.1371/journal.pone.0177347
Böhme, M., Spassov, N., Ebner, M., Geraads, D., Hristova, L., Kirscher, U., Kötter, S., Linnemann, U., Prieto, J., Roussiakis, S., Theodorou, G., Uhlig, G., Winklhofer, M., 2017. Messinian Age and savanna environment of the possible hominin Graecopithecus from SE Europe. — PLoS One, 12 (5): e0177347. https://doi.org/10.1371/journal.pone.0177347
Böhme, M., Spassov, N., Ebner, M., Geraads, D., Hristova, L., Kirscher, U., Kötter, S., Linnemann, U., Prieto, J., Roussiakis, S., Theodorou, G., Uhlig, G., Winklhofer, M., 2017. Environment and stratigraphy of the classical Pikermi sites and post-Pikermian localities and the first, Late Miocene, Sahara desertification. — 15th Congress of the R.C.M.N.S. ‘Exploring a physical laboratory: the Mediterranean Basin’, 3—6 September 2017, Athens, Abstracs, p. 31.
Böhme, M., Kötter, S., Fuss, J., Uhlig, G., Spassov, N., 2017. The diet of Graecopithecus freybergi: phytoliths and dentognathic evidence. — 5th Congress of the RCMNS. September 03—06.2017. Book of Abstracts.
Spassov, N., Spiridonov, G., Ivanov, V., Assenov, L., 2016. Bear footprints and their use for monitoring and estimating numbers of brown bears (Ursus arctos L.) in Bulgaria. — Historia naturalis bulgarica, 23: 119—126. [PDF] https://doi.org/10.5281/zenodo.4043917
Spassov, N., Ivanov, V., 2016. Home range, movements and activity patterns of an exceptionally large male Brown Bear (Ursus arctos L.) in the area of the Bulgarian-Greek border (Western Rhodope Mts.). — ZooNotes 89: 1—3.
Spassov, N., Ignatov, A., Acosta-Pankov, I., 2016. On the status of the leopard in Turkey, again. — CAT news, 64: 18—21.
Spassov, N., 2016. Southeastern Europe as a route for the earliest dispersal of Homo toward Europe: Ecological Conditions and the Timing of the First Human Occupation of Europe. In: Harvati, K., Roksandic, M. (eds), Paleoanthropology of the Balkans and Anatolia. Springer, Dordrecht, 281—290. — 10.1007/978-94-024-0874-4_16
Spassov, N., 2016. On the origin of Wisent, again. — Historia naturalis bulgarica, 23: 207—210.
Ivanova, S., Gurova, M., Spassov, N., Hristova, L., Tzankov, N., Popov, V., Marinova, E., Makedonska, J., Smith, V., Ottoni, C., Lewis, M., 2016. Magura Cave, Bulgaria: a multidisciplinary study of Late Pleistocene human palaeoenvironment in the Balkans. — Quaternary international, 86—108. https://doi.org/10.1016/j.quaint.2015.11.082 [PDF]
Hristov, P., Sirakova, D., Mitkov, I., Spassov, N., Radoslavov, G., 2016. Balkan Brachicerous Cattle — the first domesticated cattle in Europe. — Mitochondrial DNA, Part A. https://doi.org/10.1080/24701394.2016.1238901
Гюрова, М., Иванова, С., Спасов, Н., Христова, Л., Крумов, И., Ферхейден, С., Маринова, Е., Дедов, И., 2016. Проучване на пещерата Мишин камик — сезон 3. — Археологически открития и разкопки през 2015 г. БАН. Национален археологически институ с музей. София, с. 56—58.
Geraads, D., Spassov, N., 2016. Musteloid carnivores from the upper Miocene of South-Western Bulgaria, and the phylogeny of the Mephitidae. — Geodiversitas, 38 (4): 543—558. https://doi.org/10.5252/g2016n4a5
David, D., Orr, C. M., Hodgkins, J., Spassov, N., Gurova, M., Miller, C., Tzankov, Ts., 2016. The Human Fossil Record of Bulgaria and the Formulation of Biogeographic Hypotheses. — In: Harvati, K., Roksandic, M. (eds), Paleoanthropology of the Balkans and Anatolia. Springer, Dordrecht, 187—211.
de Jong, Y., Kouwenberg, J., Boumans, L., Hussey, C., Hyam, R., Nicolson, N., Kirk, P., Paton, A., Michel, E., Guiry, M., Boegh, P., Pedersen, H., Enghoff, H., von Raab-Straube, E., Güntsch, A., Geoffroy, M., Müller, A., Kohlbecker, A., Berendsohn, W., Appeltans, W., Arvanitidis, C., Vanhoorne, B., Declerck, J., Vandepitte, L., Hernandez, F., Nash, R., Costello, M., Ouvrard, D., Bezard-Falgas, P., Bourgoin, T., Wetzel, F., Glöckler, F., Korb, G., Ring, C., Hagedorn, G., Häuser, C., Aktaç, N., Asan, A., Ardelean, A., Borges, P., Dhora, D., Khachatryan, H., Malicky, M., Ibrahimov, S., Tuzikov, A., De Wever, A., Moncheva, S., Spassov, N., Chobot, K., Popov, A., Boršić, I., Sfenthourakis, S., Kõljalg, U., Uotila, P., Olivier, G., Dauvin, J., Tarkhnishvili, D., Chaladze, G., Tuerkay, M., Legakis, A., Peregovits, L., Gudmundsson, G., Ólafsson, E., Lysaght, L., Galil, B., Raimondo, F., Domina, G., Stoch, F., Minelli, A., Spungis, V., Budrys, E., Olenin, S., Turpel, A., Walisch, T., Krpach, V., Gambin, M., Ungureanu, L., Karaman, G., Kleukers, R., Stur, E., Aagaard, K., Valland, N., Moen, T., Bogdanowicz, W., Tykarski, P., Węsławski, J., Kędra, M., M. de Frias Martins, A., Abreu, A., Silva, R., Medvedev, S., Ryss, A., Šimić, S., Marhold, K., Stloukal, E., Tome, D., Ramos, M., Valdés, B., Pina, F., Kullander, S., Telenius, A., Gonseth, Y., Tschudin, P., Sergeyeva, O., Vladymyrov, V., Rizun, V., Raper, C., Lear, D., Stoev, P., Penev, L., Rubio, A., Backeljau, T., Saarenmaa, H., Ulenberg, S., 2015. PESI — a taxonomic backbone for Europe. — Biodiversity Data Journal, 3: e5848. https://doi.org/10.3897/BDJ.3.e5848
Спасов, Н., Тошева, С., 2015. Националният природонаучен музей при БАН на 125 години. — Historia naturalis bulgarica, 21: 3—8. [PDF]
Spassov, N., Spiridonov, G., Ivanov, V., Assenov, L., 2015. Signs of the bear life activities and their utilization for the monitoring of the bear (Ursus arctos L.) in Bulgaria. — Historia naturalis bulgarica, 22: 73—83. [PDF] https://doi.org/10.5281/zenodo.4043873
Spassov, N., Peykov, V., Simeonov, P., 2015. Evidences for the Lynx recovery in Bulgaria: the Lynx discovered in Western Rhodopes. — ZooNotes, 73: 1—4.
Spassov, N., Iliev, N., Karastoyanova, N., Chohadziev, S., 2015. The Remains of Wild and Domestic Animals from the Late Chalcolithic Tell Settlement of Hotnitsa (Northern Bulgaria). — Archaeologia Bulgarica, IXI, 2, 1—21.
Spassov, N., Ignatov, A., Acosta-Pankov, I., 2015. The Story of the Turkish Dhole. Exploring and documenting diversity in nature. — CETAF Newsletter, October 2015.
Spassov, N., Geraads, D., 2015. A New Felid from the Late Miocene of the Balkans and the Contents of the Genus Metailurus Zdansky, 1924 (Carnivora, Felidae). — Journal of Mammal Evolution, 22: 45—56. https://doi.org/10.1007/s10914-014-9266-5 [PDF]
Shaller, M., Lachner, J., Christl, M., Maden, C., Spassov, N., Ilg, A., Böhme, M., 2015. Authigenic Be as a tool to date river terrace sediments? — An example from a Late Miocene hominid locality in Bulgaria. — Quaternary Geochronology, 29: 6—15.
Ivanov, V., Spassov, N., 2015. Some new data on the distribution, habitats and ecology of the threatened European mustelids Mustela eversmanii and Vormela peregusna in Bulgaria. — Historia naturalis bulgarica, 21: 267—271. [PDF] https://doi.org/10.5281/zenodo.4043845
Hristov, P., Spassov, N., Iliev, N., Radoslavov, G., 2015. An Independent Event of Neolithic Cattle Domestication on the South-Eastern Balkans. Evidence from Prehistoric Aurochs and Cattle Populations. — Mitochondrial DNA, Taylor & Francis Group. https://doi.org/10.3109/19401736.2015.1127361 [PDF]
Гюрова, М., Иванова, С., Крумов, И., Спасов, Н., Христова, Л., Дожар, К., 2015. Проучване на пещерата Мишин камък — сезон 2. — Археологически открития и разкопки през 2014 г. БАН. Национален археологически институт с музей. София, с. 32—33.
Banea, O. C., Bogdanowicz, W., Lapini, L., Giannatos, G., Spassov, N., 2015. Letter of complaint about the situation of the golden jackal in Lithuania. — GOJAGE e-bulletin form 2nd of June 2015.
Спасов, Н., Тошева, С., 2015. Националният природонаучен музей при БАН отбеляза 125 години. — сп. Гора, 1: 10—11. [PDF]
Spassov, N., Stoyanov, S., 2014. On the specific taxonomical status of the wolf-jackal Canis lupaster. — First International Jackal Symposium. Book of abstracts. 13—16 October. Veliko Gradiste, Serbia. Univ. of Belgrade, p. 20.
Spassov, N., Iliev, N., 2014. Bone remains from domestic and wild Animals. — In: Yabalkovo, Vol. 1., Chapter XII. Edited by: J. Roodenberg, K. Leshtakov, V. Petrova. ATE — Ars et Technica Explicatus, Sofia University ‘ST. Kliment Ohridski’. Sofia, 2014, 425—432. [PDF]
Иванова, С., Крумов, И., Спасов, Н., Христова, Л., Македонска, Ж., Гюрова, М., Страйт, Д., 2014. Археологически проучвания в пещерата Мишин камик, Чипровско. — Археологически открития и разкопки през 2013 г. БАН. Национален археологически институт с музей. София, с. 31—33.
Gurov, T., Atanassov, E., Karaivanova, A., Serbezov, R., Spassov, N., 2014. Statistical Estimation of Brown Bears population in Rhodope Mountains. — Proceedings of the International Conference: Numerical Methods for Scientific Computations and Advanced Applications (NMSCAA’14). May 19—22, 2014, Bansko, Bulgaria. Georgiev K (editor). IICT & SIAM, Sofia, pp. 43—46.
Acosta-Pankov, I., Spassov, N., 2014. Preliminary results on social behavior of golden jackals (Canis aureus Linnaeus, 1758) living in captivity at the Zoo in Sofia, Bulgaria. — First International Jackal Symposium. Book of Abstracts.
Acosta-Pankov, I., Banea, O. C., Spassov, N., 2014. Preliminary results of the population density of Golden jackals (Canis aureus Linnaeus, 1758) in various habitats in Eastern Bulgaria. — First International Jackal Symposium. Book of abstracts. 13—16 October. Veliko Gradiste, Serbia. Univ. of Belgrade, p. 12.
Спасов, Н., Тошева, С., 2014. Националният природонаучен музей при БАН на 125 години. — сп. Наука, 5: 8—9. [PDF]
Недялков, Н., Спасов, Н., 2014. От кафявозъбката до кафята мечка (бозайници). — В: Природното богатство на Природен парк Витоша, 107—122.
Šálek, M., Spassov, N., Andera, M., Enzinger, K., Ottlecz, B., Hegyeli, Zs., 2013. Population status, habitat associations, and distribution of the steppe polecat Mustela eversmanii in Europe. — Acta Theriologica, 58 (3): 233—244. [PDF]
Tzankov, Tz., Spassov, N., Stoyanov, K., Geraads, D., 2013. Late Miocene model of the area between Vardar and Middle Struma Rivers. Neogene to Quaternary Geological Evolution of Mediterranean, Paratethys and Black Sea. — RCMNS 14th Congress, 8—12 September 2013 Istambul. Book of Abstracts, p. 184.
Иванова, С., Гюрова, М., Спасов, Н., Христова, Л., Гяурова, Б., Македонска, Ж., Анастасова, Е., Маринова, Е., Ходжкинс, Д., Милър, К., Страйт, Д., 2013. Археологически проучвания в пещерата Магура. — Археологически открития и разкопки през 2012 г. LII Национална археологическа конференция. БАН. Национален археологически институт с музей. София, с. 34—37.
Hristova, L., Geraads, D., Markov, G., Spassov, N., 2013. Late Miocene mammals from Kocherinovo, Southwestern Bulgaria. — Acta zoologica bulgarica, 65 (4): 521—534. [PDF]
Geraads, D., Spassov, N., Kovachev, D., 2013. Palaeoreas lindermayeri (Wagner, 1848) from the upper Miocene of Bulgaria, and a revision of the species. — Geodiversitas, Paris, 25 (2): 405—415.
Böhme, M., Aiglstorfer, M., Boev, Z., Bullmann, L., Dolezych, M., Havlik, P., Hristova, L., Ilg, A., Markov, G., Ognjanova, N., Prieto, J., Uhl, D., Vasilyan, D., Spassov, N., 2013. Staniantsi — an exceptional vertebrate locality from the Miocene-Pliocene transition of Western Bulgaria. Neogene to Quaternary Geological Evolution of Mediterranean, Paratethys and Black Sea. — RCMNS 14th Congress, 8—12 September 2013 Istambul. Book of Abstracts, p. 135.