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♦ 1Foraging by lynx and its role in ungulate mortality: the local (Białowieża Forest) and the Palaearctic viewpoints, Włodzimierz JĘDRZEJEWSKI, Krzysztof SCHMIDT, Lech MIŁKOWSKI, Bogumiła JĘDRZEJEWSKA, Henryk OKARMA, Acta Theriologica 38 (4): 385-403
♦ 2Nestling diet and parental provisioning behaviour in the Marsh harrier (Circus aeruginosus), Marcin BRZEZIŃSKI, Michał ŻMIHORSKI, Acta Zoologica Lituanica, 2009, Volumen 19, Numerus 2