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Sirkiä, S.; Nikula, A.; Helle, P.; Lindén, H.; Norrdahl, K.; Suorsa, P.; Valkeajärvi, P. Contemporary Mature Forest Cover Does Not Explain the Persistence of Capercaillie (Tetrao Urogallus) Lekking Areas in Finland. Ornis Fenn 2011, 88, 208–216.