1. Effects of exogenous enzymes on in vitro gas production kinetics and ruminal fermentation of four fibrous feeds M.M.Y. Elghandour, A.Z.M. Salem, M. Gonzalez-Ronquillo, J.L. Bórquez, H.M. Gado, N.E. Odongo, C.G. Peñuelas Animal Feed Science and Technology CrossRef