Tsalev, M. 1965 [Parasites living on Parthenolecanium Sulc. species in Bulgaria.]. Rastitelna Zashchita 13(5): 25.

Notes: Species discussed include Parthenolecanium corni, P. persicae, P. rufulum, P. fletcheri and P. pomeranicum. Includes notes on five species of Parthenolecanium; hosts and economic importance; first record for P. fletcheri and P. pomeranicum in Bulgaria.