1. On-line automated high-performance liquid chromatographic determination of total riboflavin phosphates using immobilized acid phosphatase as a pre-column reactor
2. British Pharmacopoeia, The Stationery Office Limited, London, vol. I, 1999, pp. 1253–1254.
3. The Japanese Pharmacopoeia, 13th ed., Hirokawa Publishing, Tokyo, 1996, pp. C-2821.
4. The United States Pharmacopeia, 24th Edition, The United States Pharmacopeial Convention, Inc., Rockville, MD, 2000, pp. 1481–1483.