The nutritive value of Panicum maximum (Guinea grass). 3. Factors affecting voluntary intake by cattle and water buffaloes Johnson, W.L.; Hardison, W.A.; Ordoveza, A.L.; Castillo, L.S. J. agric. Sci, Camb. 71(1): 67-71 1968 https://eurekamag.com/research/014/758/014758380.php