- Bovey, P., and G. A. Geer. 1969. Observations on some Scolytidae on Pinus sylvestris in the Foret de Finges (Valais, Switzerland) [In French] . Beiheft zu den Zeitschriften des Schweizerischen Forstvereins 46:309-318.
- Coster, J. E., S. F. Geer, and P. C. Johnson. 1981. Effects of weather on flight activity of southern pine beetle . Georgia Entomological Society, Journal 16:272-282.
- Geer, S. F. 1979. Effects of weather on flight of the southern pine beetle, Dendroctonus frontalis Zimm. (Coleoptera: Scolytidae). Unpublished thesis, Stephen F. Austin State University, Nacogdoches, Texas. 105 p.
- Geer, S. F., J. E. Coster, and P. C. Johnson. 1981. Effects of weather on flight activity of southern pine beetle . Georgia Entomological Society, Journal 16:272-282.