Kozár, F., & Viktorin, R.A. 1978 Survey of scale insects (Homoptera: Coccoidea) infestations in European orchards: Changes in the scale infestation levels in Hungarian orchards between 1971 and 1976.. Acta Phytopathologica Academiae Scientiarum Hungaricae 13: 391-402.

Notes: Discusses 10 coccoid species; charts of infestations.