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APA Citation
Pilfold, N. W., McCall, A., Derocher, A. E., Lunn, N. J., & Richardson, E. (2017). migratory response of polar bears to sea ice loss: to swim or not to swim. Ecography, 40(1), 189–199. http://access.bl.uk/ark:/81055/vdc_100041767841.0x000038