- Nance, W. L., R. H. Polmer, and G. C. Keith. 1975. MIDPLOT: a program for plotting multi-dimensional data. United States Department of Agriculture, Forest Service, Southern Forest Experiment Station, General Technical Report SO-7. 26 p.
- Keith, D. 1990. Qui n'a pas encore chassé dans les pièges à scolytes? [Who has never hunted with a scolytid trap?. ] L'Entomologiste 46:137-138.