Preziuso, S, E Taccini, G Rossi, G Renzoni, and G Braca. “Experimental Maedi Visna Virus Infection in Sheep: A Morphological, Immunohistochemical and PCR Study After Three Years of Infection”. European Journal of Histochemistry 47, no. 4 (June 26, 2009): 373-378. Accessed November 12, 2019. https://www.ejh.it/index.php/ejh/article/view/849.