Evaluation of lignin contents in tropical forages using different analytical methods and their correlations with degradation of insoluble fiber - Gomes, D. I; Detmann, Edenio; Valadares Filho, Sebastiao de Campos; Fukushima, Romualdo Shigueo; Souza, M. A; Valente, T. N. P; Paulino, Mário Fonseca; Queiroz, Augusto Cesar de (Animal Feed Science and Technology, 2011)