ROEDEL, P.M. & RIPLEY, W.E. (1950)
California sharks and rays. California Fish and Game Bulletin, 75: 88 pp., 65 figs
HERALD, E.S. & RIPLEY, W.E. (1951)
The relative abundance of sharks and bat stingrays in San Francisco Bay. California Fish and Game, 37 (3): 315–329