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1by Tarmo Virtanen, Seppo Neuvonen, Pekka Niemelä, Ari Nikula, Martti VaramaGet access
Published in Silva Fennica (1996)
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2by Markus Melin, Heli Viiri, Olli-Pekka Tikkanen, Riku Elfving, Seppo NeuvonenGet access
Published in Silva Fennica (2020)
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Article in Journal/Newspaper