A. SANTRA, S. KONAR, A. MANDAL, and S. K. DAS, “Rumen fermentation pattern, enzyme profile and ciliate protozoal population in betel (Piper betle) leaves fed lactating crossbred cows”, Indian J of Anim Sci, vol. 86, no. 5, pp. 589–595, May 2016, doi: 10.56093/ijans.v86i5.58507.