KUMAR, AMIT, et al. “Safety and Efficacy of Reduced Dose Brucella Abortus Strain- 19 Vaccine in Non-Pregnant Zebu Cattle (Bos Indicus) Heifers”. The Indian Journal of Animal Sciences, vol. 86, no. 2, Feb. 2016, pp. 136–139, https://doi.org/10.56093/ijans.v86i2.55773.