Nakamichi, Masayuki, and Miho Saito. “Uncommon Behaviours Observed in a Family Group of Captive Black Rhinoceros Diceros Bicornis: Nursing of Older Offspring and Redirected Aggression”. Journal of Zoo and Aquarium Research, vol. 14, no. 2, Apr. 2026, pp. 75-79, doi:10.19227/jzar.v14i2.955.