Heikura, Jonna, Nina Smeds, Kaija Valkonen, Mauri Nieminen, Øystein Holand, and Vesa Virtanen. 2007. “Finnish and Norwegian reindeer milk betalactoglobulin; characterization of genetic variants”. Rangifer 27 (3):89-90. https://doi.org/10.7557/2.27.3.275.