Llorens Climent, J.M. 1990 . Homoptera I, Cocchinillas de los cítricos y su control biológico. [Scale insects and their biological control.] Pisa Ediciones Alicante, Spain 260 pp.

Notes: Reviews scales from the Diaspididae, Lecanididae, Pseudococcidae and Margarodidae families that occur in Spain; also discusses species that occur in other countries such as Pinnaspis strachani, Coccus aegaeus and Coccus pseudomagnoliarum.