Miguel, J.A., B. Asenjo, J. Ciria, E. del Cacho, and J.L. Calvo. 2008. “Comparison of Control Methods for Coccidiosis in Native Spanish "Castellana Negra" Chickens”. Spanish Journal of Agricultural Research 6 (4), 531-36. https://doi.org/10.5424/sjar/2008064-347.