- Beeman, S. L., and D. M. J. Norris. 1977a. Embryogenesis of Xyleborus ferrugineus (Fabr) (Coleoptera, Scolytidae): I, external morphogenesis of male and female embryos. Journal of Morphology 152177-219.
- Beeman, S. L., and D. M. J. Norris. 1977b. Embryogenesis of Xyleborus ferrugineus (Fabr) (Coleoptera, Scolytidae): II, developmental rates of male and female embryos. Journal of Morphology 152221-227.
- Beeman, S. L., and D. M. Norris. 1977a. Embryogenesis of Xyleborus ferrugineus (Fabr) (Coleoptera, Scolytidae): I, external morphogenesis of male and female embryos . Journal of Morphology 152:177-219.
- Beeman, S. L., and D. M. Norris. 1977b. Embryogenesis of Xyleborus ferrugineus (Fabr) (Coleoptera, Scolytidae): Il/developmental rates of male and female embryos . Journal of Morphology 152:221-227.