Rungcharoen, P., Kalandakanond-Thongsong, S. and Thongsong, B. 2013. Effects of Dietary Protein Deficiency on Plasma Amino Acids and Physical – Histological Conformation of the Mammary Glands in Lactating Sows. The Thai Journal of Veterinary Medicine. 41, 3 (Jun. 2013), 361–370.