I'll take a look tomorrow-- I might have a few articles on my computer still. May have a few hard copies. Probably have references somewhere. Since I use my university library for most part to access articles -- I don't think I can give weblinks. Namaste, Liz <A HREF="http://www.csun.edu/~ecm59556/Healthycarb/index.html"> http://www.csun.edu/~ecm59556/Healthycarb/index.html</A>