1. Aphids in apple orchards in Central-South Bulgaria;R. Andreev;J. Plant Protection Res,2007
2. CAB International 2005. Crop Protection Compendium. (CD ed.)., CAB International, Wallingford, UK.
3. Aphis citricola van der Goot, a new aphid pest of citrus in Iran;S. Hodjat;Entomologie et Phytopathologie Appliquees,1983