Kimura, S. & Kamimura, T. & Takema, Y. & Kubota, M. (1981)
Lower vertebrate collagen. Evidence for type I-like collagen in the skin of lamprey and shark. Biochimica et Biophysica Acta (BBA)/Protein Structure, 669(2), 251–257
DOI: 10.1016/0005-2795(81)90248-8