Kozarshevskaya, E.F., & Reitzel, J. 1976 Two coccids (Homoptera: Coccoidea) new for Denmark.. Statens Forsogsvirksomhed i Plantekultur Beretning Appendix to 1226: 2 pp.

Notes: Chnaurococcus subterraneus, Pseudochermes fraxini.