@inbook {2385,
	title = {Review of the hymenopteran fauna (Insecta: Hymenoptera) of the Vratchanska Planina Mountains with a checklist of species},
	booktitle = {Faunistic diversity of Vrachanski Balkan Nature Park. Part 2, EDds.: Bechev, D., Georgiev, D.},
	year = {2019},
	pages = {81-106},
	publisher = {ZooNotes, Supplement 7, Plovdiv University Press},
	organization = {ZooNotes, Supplement 7, Plovdiv University Press},
	address = {Plovdiv},
	author = {Toshko Ljubomirov}
}
@article {1932,
	title = {Towards DNA-aided biogeography: An example from Tetramorium ants (Hymenoptera, Formicidae)},
	journal = { Ann. Zool. Fennici},
	volume = {42},
	year = {2005},
	pages = {35},
	chapter = {23},
	author = {Florian M. Steiner and Birgit C. Schlick-Steiner and Matthias Sanetra and Toshko Ljubomirov and Vera Antonova and Erhard Christian and Christian Stauffer}
}
