Hai T T, Ly N T H and Preston T R 2013: Effect of replacing fish meal by a mixture of ensiled taro (Colocasia esculenta) foliage and ensiled sweet potato vines (Ipomoea batatas L.) on reproduction and piglet performance in VanPa sows in central Vietnam. Livestock Research for Rural Development. Volume 25, Article #39. Retrieved , from http://www.lrrd.org/lrrd25/3/hoal25039.htm