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♦ ¹C. R. Field (1970) A Study of the Feeding Habits of the Hippopotamus (Hippopotamus amphibius Linn.) in the Queen Elizabeth National Park, Uganda, With Some Management Implications, Zoologica Africana, 5:1, 71-86,
♦ ²FEEDING BEHAVIOUR OF CAMEL REVIEW, Arshad Iqbal & Bakht Baidar Khan, Pak. J. Agri. Sei. Vol. 38 (3-4), 2001, p. 58-63