- Helland, I. S., J. M. Hoff, and O. Anderbrant. 1984. Attraction of bark beetles (Coleoptera, Scolytidae) to a pheromone trap: experimental and mathematical models . Journal of Chemical Ecology 10:723-752.
- Hoff, H. S. 1938. Investigations into the nutrition of the ash bark beetle, Hylesinus fraxini Panz . Annals of Applied Biology 25:390-405.
- Hoff, R. J. 1978. Mountain pine cone beetle damage in the Sandpoint Seed Orchard. Pages 37-40 in Progress Report of Inland Empire Cooperative Forest Tree Improvement Program, University of Idaho, Moscow.
- Arno, S. F., and R. J. Hoff. 1989. Silvics of whitebark pine (Pinus albicaulis). United States Department of Agriculture, Forest Service, Intermountain Research Station, Ogden, Utah, Research Paper INT-253. 11 p.