Ly J, Pheap H, Saeth K and Samkol P 2002:
The effect of DL-methionine supplementation on digestibility and performance traits of growing pigs fed broken rice and water spinach (Ipomoea aquatica).
Livestock Research for Rural Development. Volume 14, Article #49.
Retrieved
, from http://www.lrrd.org/lrrd14/5/ly145b.htm