J. Heikura, N. Smeds, K. Valkonen, M. Nieminen, Ø. Holand, and V. Virtanen, “Finnish and Norwegian reindeer milk betalactoglobulin; characterization of genetic variants”, Ran, vol. 27, no. 3, pp. 89–90, Apr. 2007, doi: 10.7557/2.27.3.275.