Gerald W. Garner, Steven T. Knick, David C. Douglas, Seasonal Movements of Adult Female Polar Bears in the Bering and Chukchi Seas, Bears: Their Biology and Management, Vol. 8, A Selection of Papers from the Eighth International Conference on Bear Research and Management, Victoria, British Columbia, Canada, February 1989 (1990), pp. 219-226
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Garner et al. (1990) studied this question.
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