M. M. Zapata Restrepo, O. Arroyave Henao, R. Ramirez García, C. Piedrahita Ochoa, J. D. Rodas González, and J. G. Maldonado Estrada, “Identification of Mycobacterium avium subspecies paratuberculosis by PCR techniques and establishment of control programs for bovine paratuberculosis in a dairy herds”., Rev. colomb. cienc. pecu., vol. 23, no. 1, pp. 17–27, Mar. 2010.