Babkin, B.P. & Bowie, D.J. & Nicholls, J.V.V. (1933)
Structure and Reactions to stimuli of arteries (and conus) in the elasmobranch genus Raja. Contributions to Canadian Biology and Fisheries, 8(1), 207–225
DOI: 10.1139/f33-016

Babkin, B.P. (1929)
Studies on the pancreatic secretion in skates. Biological Bulletin, 57, 272–291