1. Tree mortality and radial growth losses caused by western spruce budworm in a Douglas-fir stand in British Columbia;Alfaro;Can. J. For. Res.,1982
2. Douglas-fir tussock moth damage in British Columbia;Alfaro;For. Chron.,1987
3. Alfaro, R., Axelson, J., Lewis, K., Barichivich, J., Durán, L, Hugo, G., Haavik, L., Hardy, K., Jones, E., López, L., Mansilla, C., Paz Peña, M., and Suarez, L. 2008. Dendrochronogical reconstructions of western spruce budworm (Choristoneura occidentalis Freeman) at McCall Lakes, Peachland, British Columbia, Canada. Unpublished report on file at the Pacific Forestry Centre, Victoria, BC, Canada.
4. The theory and classification of outbreaks;Berryman,1987
5. Trends in the frequency, extent, and severity of spruce budworm outbreaks in eastern Canada;Blais;Can. J. For. Res.,1983