1. Harps and hoods: ice-breeding seals of the Northwest Atlantic;Lavigne,1988
2. A rediscovered whelping population of hooded seals Cystophora cristata Erxleben and its possible relationship to other populations;Sergeant;Polarforschung,1974
3. Report of the joint ICES/NAFO working group on harp and hooded seals;Anonymous,1993
4. Om klappmyssbestanden i det nordlige Atlantehav;Rasmussen;Fisken Havet,1960
5. An analysis of the morphological relationships between the hooded seals (Cystophora cristata) of Newfoundland, the Denmark Strait, and Jan Mayen;Wiig;J Zool London,1984