Contribution to the study of apparent digestibility of the hay of Pangola grass (Digitaria decumbens), Para grass (Brachiaria mutica) and Coloniao grass (Panicum maximum) at different stages of development Meneses, J.B. de O.S.; Ferreira, A.B.; Hypolito, R.I.J.; Dusi, G.A. Agronomia, Brazil 31(1): 51-56 1973 https://eurekamag.com/research/000/325/000325439.php