Kozlowski, C. P., Clawitter, H. L., Asa, C. S., Macek, M. S., Snyder, T. L. and Tieber, A. M. (2018) “Patterns of fecal steroids associated with reproduction in two Cracidae species: the blue-throated piping guan (Pipile cumanensis cumanensis) and the horned guan (Oreophasis derbianus)”, Journal of Zoo and Aquarium Research, 6(3), pp. 85–90. doi: 10.19227/jzar.v6i3.351.