Larsson, T.A. & Tay, B.-H. & Sundström, G. & Fredriksson, R. & Brenner, S. & Larhammar, D. & Venkatesh, B. (2009)
Neuropeptide Y-family peptides and receptors in the elephant shark, Callorhinchus milii confirm gene duplications before the gnathostome radiation. Genomics, 93(3), 254–260
DOI: 10.1016/j.ygeno.2008.10.001