A.  Lapeva-Gjonova, ?Ants (Hymenoptera: Formicidae) from the Eastern Rhodopes (Bulgaria)?, in Beron P, Popov A (eds). Biodiversity of Bulgaria. 2. Biodiversity of Eastern Rhodopes (Bulgaria and Greece)., vol. 2, Sofia: Pensoft & Nat. Mus. Natur. Hist., 2004, pp. 507-513.