Rihar, J. 1963 Plant lice and scales (Aphidoidea and Coccidea) on forest and fruit trees as producers of honeydew in Slovenia.. Zastita Bilja. Beograd 14: 270-271.

Notes: Species recorded include Physokermes hemicryphus, P. piceae, Eulecanium corni and Kermes quercus.