Sherwen, Sally L., and Kerry V Fanson. “Validation of an Assay to Measure Glucocorticoid Metabolites in the Droppings of Little Penguins (Eudyptula Minor)”. Journal of Zoo and Aquarium Research, vol. 3, no. 4, Oct. 2015, pp. 134-6, doi:10.19227/jzar.v3i4.135.