* Park, Robert W. «Thule Tradition». Arctic Archaeology. Department of Anthropology, University of Waterloo
* Park, Robert W. «Thule Tradition». Arctic Archaeology. Department of Anthropology, University of Waterloo
* Pickard, George L.; Emery, William J. (1982). Descriptive Physical Oceanography. Pergamon. ISBN 978-1-4832-7877-3
* Pickard, George L.; Emery, William J. (1982). Descriptive Physical Oceanography. Pergamon. ISBN 978-1-4832-7877-3
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* Serreze, Mark C; Barry, Roger G (2014). The Arctic Climate System (2nd edición). New York: Cambridge University Press. pp. 168–172. ISBN 978-1-107-03717-5.
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* Serreze, Mark C; Barry, Roger G (2014). The Arctic Climate System (2nd edición). New York: Cambridge University Press. pp. 168–172. ISBN 978-1-107-03717-5