Lynn, S. ., Powell, K. ., Westneat, D. ., & Shepherd, B. . (1969). Seasonal and sex-specific mRNA levels of key endocrine genes in adult yellow perch (Perca flavescens) from Lake Erie. Marine Biotechnology (New York, N.Y.), 11(2), 210-22. https://doi.org/10.1007/s10126-008-9136-3 (Original work published 1969)

, Elskus, A. ., Shepherd, B. ., Crowley, P. ., McCarthy, T. ., Niedzwiecki, J. ., … Palmer, B. . (2003). Lethal and sublethal effects of atrazine, carbaryl, endosulfan, and octylphenol on the streamside salamander (Ambystoma barbouri). Environmental Toxicology and Chemistry, 22(10), 2385-92. https://doi.org/10.1897/02-528