Suzuki, K., J. Origlia, F. Alvarez, M. Faccioli, M. Silva, J. Caballero, L. Nunez, and L. Castro. 2009. “Relative Risk Estimation for Mycoplasma Synoviae in Backyard Chickens in Paraguay”. International Journal of Poultry Science 8 (9): 842–847. https://doi.org/10.3923/ijps.2009.842.847.