References list of works (co)authored by Krpac in 2009:
Krpac VT, Vujic A, Simic S, Radenkovic S, Lazarevska S (2009). Revision of the genus Dasysyrphus Enderlein, 1938 (Diptera: Syrphidae) in the fauna of Macedonia. Kragujevac Journal of Science 31, 103-108.