Sans-Coma, V. & Rodríguez, C. & López-Unzu, M.A. & Lorenzale, M. & Fernández, B. & Vida, L. & Durán, A.C. (2017)
Dicephalous v. diprosopus sharks: record of a two-headed embryo of Galeus atlanticus and review of the literature. Journal of Fish Biology, 90(1), 283–293
DOI: 10.1111/jfb.13175