[1]
J. Bryant and T. Roth, “Annual fecal glucocorticoid metabolite concentrations in pregnant and pseudopregnant polar bears (Ursus maritimus) in North American zoos”, JZAR, vol. 6, no. 1, pp. 6–11, Jan. 2018, doi: 10.19227/jzar.v6i1.259.