Kelley, C.A. & Decker, S.E. & Silva, P. & Forrest, J.N. (2014)
Gastric Inhibitory Peptide, Serotonin and Glucagon Are Unexpected Chloride Secretagogues in the Rectal Gland of the Skate (Leucoraja erinacea). American Journal of Physiology. Regulatory, Integrative and Comparative Physiology, 306, R674–R680
DOI: 10.1152/ajpregu.00531.2013

Ratner, M.A. & Decker, S.E. & Aller, S.G. & Weber, G. & Forrest, J.N. (2006)
Mercury toxicity in the shark (Squalus acanthias) rectal gland: apical CFTR chloride channels are inhibited by mercuric chloride. Journal of Experimental Zoology Part A, Comparative Experimental Biology, 305(3), 259–267
DOI: 10.1002/jez.a.257