A. C. CHANDRA, S. K. SRIVASTAVA, P. CHADHUARY, M. M. PRAKASH, and R. VERMA, “Dynamics of antibody titres in dogs vaccinated with a polyvalent killed Leptospira vaccine as measure for quality control”, Indian J of Anim Sci, vol. 83, no. 6, June 2013, doi: 10.56093/ijans.v83i6.30634.