The assay of flavor-active substances in beer
Miracle, R.E. Ebeler, S.E. and Bamforth, C.W. (2005). The measurement of sulfur-containing aroma compounds in samples from production-scale brewery operations. J Am Soc Brew Chem, 63, 129-134
http://wineserver.ucdavis.edu/people/faculty.html?id=7