Halldórsson, Sverrir Daníel, and Gísli Arnór Víkingsson. 2003. “Analysis of seasonal changes in reproductive organs from Icelandic harbour porpoises (Phocoena phocoena)”. NAMMCO Scientific Publications 5 (July). Tromsø, Norway:121-41. https://doi.org/10.7557/3.2744.