E, B., A. G, E. D, E. Yo, M. B, U. S, and B. B. “The Result of Propagation of Sheep and Goat Pox Viral Vaccine Strains into Vero Cells”. Mongolian Journal of Agricultural Sciences, vol. 26, no. 01, Apr. 2019, pp. 3-9, doi:10.5564/mjas.v26i01.1190.