WASET
Higgs, S. , Eck, E. , Heynis, K. , Broadberry, S.. "Humans as Enrichment: Human-Animal Interactions and the Perceived Benefit to the Cheetah (Acinonyx jubatus), Human and Zoological Establishment". World Academy of Science, Engineering and Technology, Open Science Index 135, International Journal of Animal and Veterinary Sciences, (2018), 12(3), 97 - 103.