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• [BeatFeis1998] Beattie, J. C. and Feistner, A. T. C. (2002). Husbandery and breeding of the Alaotran gentle lemur Hapalemur griseus alaotrensis at {Jersey Wildlife Preservation Trust}. Int.Zool. Yb., 36:11--19.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.