Opdyke, D.F. & Mcgreehan, J.R. & Messing, S. & Opdyke, N.E. (1972)
Cardiovascular responses to spinal cord stimulation and autonomically active drugs in Squalus acanthias. Comparative Biochemistry and Physiology – Part A, Physiology, 42(3), 611–620
DOI: 10.1016/0300-9629(72)90440-9

Opdyke, D.F. & Opdyke, N.E. (1971)
Splenic responses to stimulation in Squalus acanthias. American Journal of Physiology, 221(2), 623–625