1. Bakke, A. — 1955. Insects reared from Spruce cones in Northern Norway 1951. —Norsk Ent. Ts.,9, 152–212.
2. Boucek, Z. — 1955. Hymenopterous parasites ofPityophthorus polonicus Karp. —Roczniki Nauk Lesnych,11, 83–92.
3. Hedwig, K. — 1955. Mitteleuropäische Schlupfwespen und ihre Wirte. —Nachr. naturw. Mus. Aschaffenburg,47, 43–56.
4. Iwanow-Kasas, O.M. — 1955. Sekundär-parasiten einiger Blattläuse Turkmeniens (Hymenoptera: Chalcidoidea, Serphoidea, Cynipoidea). —Ent. Obosr.,34, 144–156.
5. Kerrich, G.J. — 1956. A systemtic study of the parasite complex of the Karroo Caterpillar,Loxosteges frustalis Zeller:Perilampidae and Ichneumonidac (Hym.). —J. Ent. Soc. S. Africa,19, 118–127.