1. Regimen for Health;Various,1983
2. Canada’s Food Guides from 1942 to 1992http://www.hc-sc.gc.ca/fn-an/food-guide-aliment/context/fg_history-histoire_ga-eng.php#fnb1
3. Chambers Science and Technology Dictionary;Walker,1988
4. Health and Nutritional Properties of Probiotics in Food Including Powder Milk with Live Lactic Acid Bacteriaftp://ftp.fao.org/docrep/fao/009/a0512e/a0512e00.pdf
5. Beneficial effects of lactic acid bacteria on human beings