Balan, G. Dian 2024. The world records in Asian elephants. Brussels, Balan (unpublished). pp. 1-35.
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Robert, M.P. 2020. Gross morphology, radiology and computed tomography of the ear of the southern white rhinoceros (Ceratotherium simum simum). M.Sc. Thesis presented to the University of Pretoria. pp. 1-80.
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Novriansyah, R. 2022. Peran International Rhino Foundation (IRF) dalam upaya konservasi badak sumatera di Indonesia. Jom Fisip 9 (2): 1-13.
Potter, T.; Prothero, D.R.; Welsh, E. 2025. Allometric trends in growth of the chalicothere Moropus elatus (Mammalia: Perissodactyla: Chalicotheriidae). New Mexico Museum of Natural History and Science Bulletin 100: 171-174.