L.  Penev, Stoyanov, I., Dedov, I., and Antonova, V., ?Patterns of Urbanization in the City of Sofia as Shown by Carabid Beetles, Ants and Mollusks?, Proceedings of the XIII European Carabidologists Meeting. Blagoevgrad, August 20-24, 2007, pp. 483-509, 2007.