1. Hardison, W.G.M., Gastroenterology75 (1978) 71.b
2. Spaeth, D.G., and Schneider, D.L., Proc. Soc. exp. Biol. Med.147 (1974) 855.
3. Kibe, A., Wake, C., Kuramoto, T., and Hosita, T., Lipids15 (1980) 224.
4. Matsuyama, Y., Morita, T., Higachi, M., and Tsujii, T., in: Sulfur Amino Acids: Biochemical and Clinical Aspects, p. 461. Alan R. Liss, Inc., New York 1983.
5. Attili, A.F., Angelico, M., Alvaro, D., Morin, M., De Santis, A., and Capocaccia, L., Gastroenterology68 (1984) 534.