Cox, J.M. 1989 The mealybug genus Planococcus (Homoptera: Pseudococcidae).. Bulletin British Museum (Natural History). Entomology 58(1): 1-78.
Notes: Abstract: Key to 35 species; descriptions; synonymy; eight new synonymies proposed; distributions; hosts; economic status; comparisons; nine newly described species; three species of Crisiccocus illustrated to clarify similarities with species of Planococcus.