White spruce resistance to white pine weevil related to bark resin canal density. 1997. Alfaro, R.I.; He, F.; Tomlin, E.; Kiss, G. Canadian Journal of Botany 75: 568-573.
Resistance of white spruce to white pine weevil: development of a resistance index. 1996. Alfaro, R.I.; He, F.; Kiss, G.; King, J.N.; Yanchuk, A. Forest Ecology and Management 81: 51-62.
The white pine weevil: biology, damage and management. Proceedings of a symposium held January 19-21, 1994 in Richmond, British Columbia. 1994. Alfaro, R.I.; Kiss, G.; Fraser, R.G. Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, BC. FRDA Report 226, Copublished by the BC Ministry of Forests. 311 p.