Reference

Hubert Pschorn-Walcher, O. Eichhorn (1973): Studies on the biology and exology of the egg parasites (Hym.: Chalcidoidea) of the pine sawfly Neodiprion sertifer (Geoff.) (Hym.: Diprionidae) in Central Europe. – Z.angew.Ent. – 74: 286 - 318.