Schlinger, E.I., & Doutt, R.L. 1964 Systematics in relation to biological control.. Biological Control of Insect Pests and Weeds. Chapman & Hall London 844 pp.

Notes: Scales mentioned as examples of choosing biological control agents inappropriately due to incorrect species identification, which can doom a project, are Aonidiella aurantii, Aspidiotus hederae and Pseudococcus maritimus.