1. Baurant, R., E. Seutin, A. Plasman, R. Caussin, 1968: Le Parathion et le Lindane dans la lutte contre le Chermès de l'épicéa. Bull Rech. agron. Gembloux3, 1, 3–14.
2. Bejer-Petersen, B., 1968: Nogle insecticider til bekaempelse af bladlusgaller (Sacchiphantes) på rødgran. [Some insecticides for the control of aphid galls (Sacchiphantes sp.) on Norway spruce (Picea abies)]. Dansk Skovforen. Tidsskr.53, 105–112.
3. Cameron, E. A, R. L. Campbell, andL. E Adams, 1973: Insecticidal Control ofAdelges abietis in Pennsylvania. J. Econ. Ent.66, 3, 811–812.
4. Campbell, R. L., andC. P. Balderston, 1972: Insecticidal Control ofAdelges cooleyi on Douglas-Fir in Ohio, with notes on Biology. J. Econ. Ent.65, 3, 912–914.
5. Campbell, R. L., andC. P. Balderston, 1972: Insecticidal Control of Eastern Spruce Gall Aphid During Autumn in Ohio. J. Econ. Ent.65, 6, 1745–1746.