Kozár, F., Tsalev, M., Viktorin, R.A., & Horváth, J. 1979 New data to the knowledge of the scale insects of Bulgaria (Homoptera: Coccoidea).. Folia Entomologica Hungarica 32: 129-132.

Notes: Lists 45 coccoid species in 8 families; 15 species new to Bulgaria; first record for Diaspidiotus osborni in Europe; hosts and distribution in Bulgaria.