- Safranyik, L., and R. Jahren. 1970a. Emergence patterns of the mountain pine beetle from lodgepole pine . Canada Department of Fisheries and Forestry, Canadian Forestry Service, Bi-monthly Research Notes 2611, 19.
- Safranyik, L., and R. Jahren. 1970b. Host characteristics, brood density and size of mountain pine beetles emerging from lodgepole pine . Canada Department of the Environment, Canadian Forestry Service, Bi-monthly Research Notes 26:35-36.