Acharya, M. P., S. K. Adhikari, H. Awasthi, A. Jha, and U. M. Singh. “Field Verification Trial of ND I-2 Vaccine in Nepal”. Nepalese Veterinary Journal, vol. 36, Dec. 2019, pp. 15-22, doi:10.3126/nvj.v36i0.27748.