1. Amman, G. D., and Baker, B. H., 1972, Mountain pine beetle influence on lodgepole pine stand structure, J. For.
70: 207–209.
2. Ashraf, M., and Berryman, A. A., 1969, Biology of Scolytus ventralis (Coleoptera: Scolytidae) attacking Abies grandis in northern Idaho, Melandera
2: 1–23.
3. Ashraf, M., and Berryman, A. A., 1970, Biology of Sulphuretylenchus elongatus (Nematoda: Sphaerulariidae), and its effect on its host, Scolytus ventralis (Coleoptera: Scolytidae), Can. Entomol.
102: 197213.
4. Ashraf, M., and Berryman, A. A., 1970, Histopathology of Scolytus ventralis (Coleoptera: Scolytidae) infected by Sulphuretylenchus elongatus (Nematoda: Sphaerulariidae), Ann. Entomol. Soc. Am. 63: 924930.
5. Beaver, R. A., 1966, The biology and immature stages of two species of Medetera (Diptera: Dolichopodidae) associated with the bark beetle Scolytus scolytus (F.), Proc. R. Entomol. Soc. Lond. (A)
41: 145–154.