1. British Pharmacopeia, Vol. 1, HMSO, 1993, pp. 373–374.
2. United States Pharmacopeia, Vol. 22, VSP Convention Inc., 1990, pp. 751.
3. J.I. Kroschwitz (Ed.), Encyclopedia of Chemical Technology, Vol. 13, 4th ed., Wiley, New York, 1995, pp. 1042–1054.
4. Stability-indicating high-performance liquid chromatographic assay for lactic acid in lotions
5. HPLC analysis of organic acids in lactic acid fermented vegetables