N. M. Correa Valencia, N. F. Ramírez, Bülte M., and J. A. Fernández Silva, “Fecal culture and two fecal-PCR methods for the diagnosis of Mycobacterium avium subsp. paratuberculosis in a seropositive herd”, Rev. colomb. cienc. pecu., vol. 30, no. 2, pp. 101–115, Apr. 2017.