1. Dennis, D.S. & Lavigne, R.J. (1975) Comparative behavior of Wyoming robber flies II (Diptera: Asilidae). Agricultural Experiment Station University of Wyoming-Laramie Science Monograph, No. 30, 1–68.
2. Lavigne, R.J. & Dennis, D.S. (1975) Ethology of Efferia frewingi (Diptera: Asilidae). Annals of the Entomological Society of America, 68, 992–996. https://doi.org/10.1093/aesa/68.6.992
3. Dennis, D.S., Roehrkasse, G.P. & Lavigne, R.J. (1975) Prey recognition by Efferia frewingi (Diptera: Asilidae). Annals of the Entomological Society of America, 68, 404–408. https://doi.org/10.1093/aesa/68.3.404
4. Dennis, D.S. & Lavigne, R.J. (1976) Descriptions and notes on the pupae and pupal cases of ten species of Wyoming robber flies (Diptera: Asilidae). Proceedings of the Entomological Society of Washington, 78, 277–303.
5. Dennis, D.S. & Lavigne, R.J. (1976) Ethology of Efferia varipes with comments on species coexistence (Diptera: Asilidae). Journal of the Kansas Entomological Society, 49, 48–62.