S. Britt, K. Cowlard, K. Baker, and A. Plowman, “Aggression and self-directed behaviour of captive lemurs (Lemur catta, Varecia variegata, V. rubra and Eulemur coronatus) is reduced by feeding fruit-free diets”, JZAR, vol. 3, no. 2, pp. 52–58, Apr. 2015.