Sengonca, C., & Faber, T. 1996 Studies on developmental stages of the horse chestnut scale insect, Pulvinaria regalis Canard (Hom., Coccidae), in the open land and in the laboratory.. Anzeiger Schädlingskunde, Pflanzen(schutz) und Umweltschutz 69: 59-63.

Notes: This scale studied on Aesculus x carnea in the urban area of Bonn; scale growth also determined on sycamore maple (Acer pseudoplatanus) and Aesculus hippocastanum at different temperatures in the lab; different developmental stages were separated by setting up a frequency distribution of the anal plate length and by simultaneous measuring of new and old anal plate during molting.