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♦ 1Summer diet of the sable Martes zibellina in the Middle Yenisei taiga, Siberia, Marcin BRZEZINĚSKI, Acta Theriologica 39 (1): 103-107, 1994.
♦ 2Tornberg, Risto, Pekka Helle, and Erkki Korpimaki. "Vulnerability of black grouse hens to goshawk predation: result of food supply or predation facilitation?" Oecologia 166.3 (2011): 577+. Academic OneFile. Web. 15 July 2014.