Makkar et al., 1997. Anim. Feed Sci. Technol., 67 (2/3): 245-251 Document reference Makkar, H. P. S. ; Blummel, M. ; Becker, K., 1997. In vitro rumen apparent and true digestibilities of tannin-rich forages. Anim. Feed Sci. Technol., 67 (2/3): 245-251Web http://www.sciencedirect.com/science/article/pii/S0377840196011467Citation key Makkar et al., 1997Datasheets African laburnum (Cassia sieberiana)Sicklebush (Dichrostachys cinerea)