Pathoummalangsy Khamparn and Preston T R  2006: Effect of a supplement of fresh water spinach (Ipomoea aquatica) on feed intake and digestibility in goats fed a basal diet of cassava foliage. Livestock Research for Rural Development. Volume 18, Article #35. Retrieved , from http://www.lrrd.org/lrrd18/3/kham18035.htm