Morin, P. A., Aitken, N. C., Rubio-Cisneros, N., Dizon, A. E., & Mesnick, S. (2007). Characterization of 18 SNP markers for sperm whale (Physeter macrocephalus). Molecular Ecology Notes, 7(4), 626-630. doi:10.1111/j.1471-8286.2006.01654.x.