Sarkisov, R.N., Mkrtchyan, L.P., & Khechoyan, L.S. 1983 [Effect of low temperature on the development of Ararat cochineal Porphyrophora hamelii Brandt (Homoptera, Coccoidea, Margarodidae).]. Zoological Papers, Academy of Sciences of Armenian SSR, Zoological Institute 19: 211-232.

Notes: [Summary also in Armenian].