Binh P L T, Preston T R, Van H N and Dinh V D 2018: Methane production in an in vitro rumen incubation of cassava pulp-urea with additives of brewers’ grain, rice wine yeast culture, yeast-fermented cassava pulp and leaves of sweet or bitter cassava variety. Livestock Research for Rural Development. Volume 30, Article #77. Retrieved , from http://www.lrrd.org/lrrd30/4/binh30077.html