Attributes / relations provided by
♦ 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,
♦ ²Gazella gazella, Heinrich Mendelssohn, Yoram Yom-Tov, and Colin P. Groves, MAMMALIAN SPECIES No. 490, pp. 1-7 (1995)