Makungu, Modesta; Du Plessis, Wencke M.; Barrows, Michelle; Koeppel, Katja Natalie; Groenewald, Hermanus B.(American Association of Zoo Veterians, 2012)
Makungu, Modesta; Du Plessis, Wencke M.; Barrows, Michelle; Koeppel, Katja Natalie; Groenewald, Hermanus B.(American Association of Zoo Veterinarians, 2013)