Phiny C, Ogle B, Preston T R and Borin K 2008: Digestibility and N-retention in crossbred pigs of diets with water spinach or water spinach mixed with mulberry leaves as protein sources in basal diets of cassava root meal plus rice bran, or sugar palm syrup plus broken rice. Livestock Research for Rural Development. Volume 20, supplement. Retrieved , from http://www.lrrd.org/lrrd20/supplement/phin1.htm