1. Arend, H., 1967: Über den tierischen Abbau von Fichtenzapfen. Z. ang. Ent.59, 74–109.
2. Bakke, A., 1955: Insects reared from spruce cones in northern Norway 1951. Norsk Ent. Tidsskr.9, 152–212.
3. Bakke, A., 1956: Two little known species of Chalcid-flies from spruce cones in Norway (Pteromalidae, Chalcidoidea). Norsk Ent. Tidskr.10, 43–47.
4. Bakke, A., 1963: Studies on the spruce-cone insectsLaspeyresia strobilella (L.) (Lepidoptera: Tortricidae),Kaltenbachiola strobi (Winn.) (Diptera: Itonididae) and their parasites (Hymenoptera) in Norway. Rep. of the Norw. For. Res. Inst.67, 151 pp.
5. Bakke, A., 1969: Grankonglenes skadeinsekter ogfrøplantasjene. Tidsskr. Skogbruk2, 255–263.