Falk-Petersen , Stig, Tore Haug, Kjell T. Nilssen, Anette Wold, and Trine M. Dahl. 2004. “Lipids and Trophic Linkages in Harp Seal (Phoca Groenlandica) from the Eastern Barents Sea”. Polar Research 23 (1):43-50. https://doi.org/10.3402/polar.v23i1.6265.