Geier, P. 1950 Note préliminaire sur l'hivernage de Quadraspidiotus perniciosus Comst. (Hémipt. Diaspidoide). [Preliminary note on the hybernation of Aspidiotus perniciosus.].. Mitteilungen der Schweizerischen Entomologischen Gesellschaft 23(3): 329-336.

Notes: This paper examines the biology and behavior of various stages of this species.