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- Cane, J. H., M. W. Stock, D. L. Wood, and S. J. Gast. 1990. Phylogenetic relationships of Ips bark beetles (Coleoptera: Scolytidae): electrophoretic and morphometric analyses of the Grandicollis group. Biochemical Systematics and Ecology 16:993-1013.
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- Gibson, K. E., W. E. Bousfield, S. J. Gast, and R. D. Oakes. 1988. Status and predicted trend of mountain pine beetle infestations in upper Yak River and Sullivan Creek drainages, Three Rivers and Rexford Ranger Districts, Kootenai National Forest, 1988. United States Department of Agriculture, Forest Service, Northern Region, Missoula, Montana, Timber, Cooperative Forestry and Pest Management Report. 75 p.
- Cane, J., M. Stock, D. Wood, and S. Gast. 1990. Phylogenetic relationships of Ips bark beetles (Coleoptera: Scolytidae): electrophoretic and morphometric analyses of the grandicollis group . Biochemical Systematics and Ecology 18:359-368.
- Gast, S., and M. Stock. 1994. Genetic diversity in overwintered and non-overwintered Ips pini (Say) (Coleoptera: Scolytidae) in Idaho . Pan-Pacific Entomologist 70:259-266.
- Gast, S., M. Stock, and M. Furniss. 1993. Physiological factors affecting attraction of Ips pini (Coleoptera: Scolytidae) to host odor or natural male pheromone in Idaho . Annals of the Entomological Society of America 86:417-422.