C. J. Underwood: Diversification of the Neoselachii (Chondrichthyes) during the Jurassic and Cretaceous. Paleobiology, 32 (2), 2006. pp. 215–235. PDF
doi.org
C. J. Winchell, A. P. Martin, J. Mallatt: Phylogeny of elasmobranchs based on LSU and SSU ribosomal RNA genes. Molecular Phylogenetics and Evolution, Volume 31, Issue 1, April 2004, Pages 214-224, doi:10.1016/j.ympev.2003.07.010.
N. K. Dulvy, S. L. Fowler, J. A. Musick, R. D. Cavanagh, P. M. Kyne, L. R. Harrison, J. K. Carlson, L. N. Davidson, S. V. Fordham, M. P. Francis, C. M. Pollock, C. A. Simpfendorfer, G. H. Burgess, K. E. Carpenter, L. J. Compagno, D. A. Ebert, C. Gibson, M. R. Heupel, S. R. Livingstone, J. C. Sanciangco, J. D. Stevens, S. Valenti, W. T. White. Extinction risk and conservation of the world's sharks and rays. eLife, 2014; 3 (0): e00590 doi:10.7554/eLife.00590