BARROS, N. N. et al. Comparative study with sheep and goats of the digestibility of a native legume in the semi-arid zone of Ceará, Brazil. II. In vivo digestibility of the silage of Cassia sp. Pesquisa Agropecuaria Brasileira, v. 27, n. 11, p. 1551–1555, 1 Nov.1992.