Kozár, F., Hippe, C., & Mani, E. 1997 [Key to determine Quadraspidiotus (Homoptera: Coccoidea) males and to distinguish them from males of other genera.] Kulcs a Quadraspidiotus (Homoptera: Coccoidea) pajzstetu nembe tartozo himek meghatarozasahoz.. Növényvédelem 33: 321-327.

Notes: Taxonomic keys for males, useful in distinguishing the Quadraspidiotus genus from males of other Homoptera, scale families and genera are presented. It includes differences of flight time and easily observable characters, like the antennal segment or dorsal plate. Based on the description of Quadraspidiotus perniciosus (Diaspidiotus perniciosus), a nomogram is given to exclude other species.