Grossbard, M.L. & Boyer, J.L. & Gordon, E.R. (1987)
The excretion pattern of biliverdin and bilirubin in bile of the small skate (Raja erinacea).
Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 157(1), 61–66 DOI: 10.1007/BF00702729