“Correlation Between Homologous and Heterologous Enzyme Immunoassays for Progesterone Determinations in Milk from Cows”. Revista Española de Fisiología 46, no. 3 (September 1, 1990): 303–308. Accessed July 12, 2025. https://revistas.unav.edu/index.php/ref/article/view/46312.