Naumova, M., Lazarov, S., Deltshev, C., 2019. Faunistic diversity of the spiders in Montenegro. — Ecologica Montenegrina, 22: 50—89.
Dimitrov, D., Deltshev, C., Lazarov, S., 2019. Description of Harpactea popovi sp. n. from Bulgaria with further taxonomic notes on related species (Araneae, Dysderidae). — Zootaxa, 4568 (3): 593—600. doi:10.11646/zootaxa.4568.3.13 [PDF]
Lazarov, S., Dimitrov, D., 2018. Description of Harpactea petrovi sp. n. (Araneae: Dysderidae) from Bulgaria. — Acta zoologica bulgarica, 70 (3): 293—296. [PDF]
Deltshev, C., Lazarov, S., 2018. Two new spider species, Harpactea simovi sp. n. and H. stoevi sp. n. (Araneae: Dysderidae), from the Balkan Peninsula. — Acta zoologica bulgarica, 70 (2): 3—7.
Naumova, M. V., Blagoev, G., Dimitrov, D., Lazarov, S., Deltshev, C., 2017. New data on the spider fauna (Arachnida: Araneae) of Bulgaria. — Acta zoologica bulgarica, 69 (4): 477—481. [PDF]
Dimitrov, D., Deltshev, C., Lazarov, S., 2017. Description of Histopona breviemboli sp. n. from the Balkan Peninsula (Arachnida, Araneae, Agelenidae). — Zootaxa, 4311 (2): 283—286. doi:10.11646/zootaxa.4311.2.10 [PDF]
Naumova, M., Lazarov, S., Petrov, B., Deltshev, C., 2016. New faunistic data on the cave-dwelling spiders in the Balkan Peninsula (Araneae). — Ecologica Montenegrina, 7: 425—438.
Костова Р., Лазаров, С., Бекчиев, Р., Горанов, С., Симов, Н., Бешков, С., 2016. Почвени и пещерни безгръбначни животни. — В: Спелеоложки проучвания на пещерите в община Годеч (част 1), Асоциация на спелеоклубове в София, 39—50. [PDF]
Deltshev, C., Blagoev, G., Komnenov, M., Lazarov, S., 2016. Description of Ozyptila balcanica sp. n. from the Balkan Peninsula and its comparison with the closely related O. umbraculorum Simon, 1932 (Araneae: Thomisidae). — Acta zoologica bulgarica, 68 (4): 483—490.
Langourov, M., Lazarov, S., Stoev, P., Guéorguiev, B., Deltshev, C., Petrov, B., Andreev, S., Simov, N., Bekchiev, R., Antonova, V., Ljubomirov, T., Dedov, I., Georgiev, D., 2014. New and interesting records of the MSS and cave fauna of Vitosha Mt., Bulgaria. — Proceedings of Balkan Speleological Conference 'Sofia’2014', Sofia, Bulgaria, 28—30 March 2014. Caving Club 'Helictite' — Sofia, pp. 66—76. [PDF]