Gerst, J.W. & Thorson, T.B. (1977)
Effects of saline acclimation on plasma electrolytes, urea excretion, and hepatic urea biosynthesis in a freshwater stingray, Potamotrygon sp. Garman, 1877. Comparative Biochemistry and Physiology – Part A, Physiology, 56(1), 87–93
DOI: 10.1016/0300-9629(77)90446-7
Thorson, T.B. & Gerst, J.W. (1976)
Comparison of Some Parameters of Serum and Uterine Fluid of Pregnant, Viviparous Sharks (Carcharhinus leucas) and Serum of Their Near-Term Young. In Investigation of the ichthyofauna of Nicaraguan lakes, edited by T.B. Thorson. Lincoln, Nebraska, University of Nebraska Press: 591–598
Crockett, D.R. & Gerst, J.W. & Blankenship, S. (1973)
Absence of juxtaglomerular cells in the kidneys of elasmobranch fishes. Comparative Biochemistry and Physiology – Part A, Physiology, 44(2), 673–675
DOI: 10.1016/0300-9629(73)90521-5
Thorson, T.B. & Gerst, J.W. (1972)
Comparison of some parameters of serum and uterine fluid of pregnant, viviparous sharks (Carcharhinus leucas) and serum of their near-term young. Comparative Biochemistry and Physiology – Part A, Physiology, 42(1), 33–40
DOI: 10.1016/0300-9629(72)90363-5