Hopkins, T.E. & Cech, J.J. (2003)
The influence of environmental variables on the distribution and abundance of three elasmobranchs in Tomales Bay, California. Environmental Biology of Fishes, 66(3), 279–291
DOI: 10.1023/A:1023907121605

Matern, S.A. & Cech, J.J. & Hopkins, T.E. (2000)
Diel movements of bat rays, Myliobatis californica, in Tomales Bay, California: evidence for behavioral thermoregulation? Environmental Biology of Fishes, 58(2), 173–182
DOI: 10.1023/A:1007625212099

Hopkins, T.E. & Cech, J.J. (1995)
Temperature effects on blood-oxygen equilibria in relation to movements of the bat ray, Myliobatis californica in Tomales Bay, California. Marine Behavior and Physiology, 24, 227–235

Hopkins, T.E. & Cech, J.J. (1994)
Effect of temperature on oxygen consumption of the bat ray, Myliobatis californica (Chondrichthyes, Myliobatididae). Copeia, 1994(2), 529–532

Hopkins, T.E. (1993)
The physiological ecology of bat rays, Myliobatis californica, in Tomales Bay, California. Ph.D. Thesis, University of California, Davis. 104 p.