Winchell, C.J. & Martin, A.P. & Mallat, J. (2004)
Phylogeny of elasmobranchs based on LSU and SSU ribosomal RNA genes. Molecular Phylogenetics and Evolution, 31(1), 214–224
DOI: 10.1016/j.ympev.2003.07.010
Mallat, J. (1997)
Shark pharyngeal muscles and early vertebrate evolution. Acta Zoologica(Stockholm), 78(4), 279–294
DOI: 10.1111/j.1463-6395.1997.tb01012.x