Rumfelt, L.L. & Avila, D. & Diaz, M. & Bartl, S. & McKinney, E.C. & Flajnik, M.F. (2001)
A shark antibody heavy chain encoded by a nonsomatically rearranged VDJ is preferentially expressed in early development and is convergent with mammalian IgG. Proceedings of the National Academy of Sciences of the United States of America, 98(4), 1775–1780

Greenberg, A.S. & Avila, D. & Hughes, M. & Hughes, A. & McKinney, E.C. & Flajnik, M.F. (1995)
A new antigen receptor gene family that undergoes rearrangement and extensive somatic diversification in sharks. Nature, 374(6518), 168–173
DOI: 10.1038/374168a0