Curry, E., M. Skogen, and T. Roth. “Evaluation of an Odour Detection Dog for Non-Invasive Pregnancy Diagnosis in Polar Bears (Ursus maritimus): Considerations for Training Sniffer Dogs for Biomedical Investigations in Wildlife Species”. Journal of Zoo and Aquarium Research, vol. 9, no. 1, Jan. 2021, pp. 1-7, doi:10.19227/jzar.v9i1.568.