Polar Bears por: Proceedings of the Eighth Working Meeting of the IUCN/SSC Polar Bear Specialist Group (8th : 1985 jan. 15-19 : Oslo, Norway Publicado: (1985)
Polar Bears por: Proceeding of the Ninth Working Meeting of the IUCN/SSC Polar Bear Specialist Group (9th : 1986 ago. 9-11 : Edmonton, Canada Publicado: (1986)