- Gries, G., A. Leufvens, J. P. Lafontaine, H. D. Pierce, J. H. Borden, D. Vanderwel, and A. C. Oehlenschlager. 1990. New metabolites of alpha-pinene produced by the mountain pine beetle, Dendroctonus ponderosae (Coleoptera: Scolytidae) . Insect Biochemistry 20:365-371.
- Gries, G., A. Leufven, J. Lafontaine, H. P. Jr., J. Borden, D. Vanderwel, and A. Oehlschlager. 1990b. New metabolites of alpha-pinene produced by the mountain pine beetle, Dendroctonus ponderosae (Coleoptera: Scolytidae) . Insect Biochemistry 20:365-371.
- Gries, G., J. Borden, R. Gries, J. Lafontaine, E. Dixon, H. Weiser, and A. Whitehead. 1992a. 4-Methylene-6,6-dimethylbicyclo[311]hept-2-ene (Verbene): new aggregation pheromone of the scolytid beetle Dendroctonus ruflpennis . Naturwissenschaften 79:367-368.
- Miller, D., and J. Lafontaine. 1991. cis-Verbenol: an aggregation pheromone for the mountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Scolytidae) . Journal of the Entomological Society of British Columbia 88:34-38.