M. Pancak

Seasonal variations in spermatogenesis, testicular weights, vasa deferentia, and androgen levels in neotenic male tiger salamanders, Ambystoma tigrinum.

D. O. Norris, M. Norman, D. Duvall, 1985, General and comparative endocrinology.

Seasonal and daily plasma corticosterone rhythms in American toads, Bufo americanus.

D. H. Taylor, M. Pancak, 1983, General and comparative endocrinology.