Kozár, F., & Drozdják, J. 1988 Peculiarities in the distribution of scale insects (Homoptera: Coccoidea) on deciduous fruit trees in Hungary.. Acta Phytopathologica et Entomologica Hungarica 23(1-2): 187-210.

Notes: Abstract: Distribution maps of 11 scale insects commonly on apple, pear, peach, plum, cherry & sour cherry.