Vasseur, R., & Schvester, D. 1957 Biologie et ecologie du pou de San Jose (Quadraspidiotus perniciosus Comst.) en France. [Biology and ecology of the San Jose scale (Quadraspidiotus perniciosus Comst.]. Annales des Epiphyties (Ann. de l'Inst. Nat. Rech. Agron. Ser. C) 8: 5-66.

Notes: [Original title: Biologie et ecologie du pou de San Jose (Quadraspidiotus perniciosus Comst.) en France.] Detailed study including description, biology, distribution in France; factors affecting populations.