Kozár, F., Guignard, E., Bachmann, F., Mani, E., & Hippe, C. 1994 The scale insect and whitefly species of Switzerland (Homoptera: Coccoidea and Aleyrodoidea).. Mitteilungen der Schweizerischen Entomologischen Gesellschaft/Bulletin of the Societe Entomologique Suisse 67(1-2): 151-161.

Notes: Abstract: 87 scale species belonging to 9 families found; 34 new for Switzerland; one new for Europe; six important pests found to have substantially increased populations: Quadraspidiotus marani, Q. ostraeaeformis, Q. pyri, Pseudaulacaspis pentagona, Carulaspis juniperi and Eupulvinaria hydrangeae; distribution within Switzerland; host plants; preferred parts of plants; developmental stages; populations densities.