Korndörfer, C. M., Meirelles, C. F., Bueno, I. C. da S., & Abdalla, A. L. (1998). Evaluation of extraction methods for progesterone determination in rabbit (Oryctolagus cuniculus) feces by radioimmunoassay. Brazilian Journal of Veterinary Research and Animal Science, 35(3), 115-119. https://doi.org/10.1590/S1413-95961998000300004