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Krief, S., Cibot, M., LIEN INTROUVABLE, Seguya, A., Krief, J.M., Masi, S., 2014. Wild chimpanzees on the edge: nocturnal activities in cropland, PLoS ONE, 9, 10, e109925, doi:10.1371/journal.pone.0109925, http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0109925