Kongvongxay ​​​​​​​​​​​​​​​​​​​​​​​​​​​​Sitone, Preston T R, Leng R and Duong Nguyen Khang​​​ 2011 Effect of a tannin-rich foliage (Mimosa pigra) on feed intake, digestibility, N retention and methane production in goats fed a basal diet of Muntingia calabura.  Livestock Research for Rural Development. Volume 23, Article #055. Retrieved , from http://www.lrrd.org/lrrd23/3/sito23055.htm