1. S.P. Coburn, in D. Dolphin, R. Poulson and O. Avramovic (Editors), Vitamin B6 Pyridoxal Phosphate. Chemical, Biochemical and Medical Aspects, Part A, Wiley, New York, 1986, Ch. 15, p. 497.
2. J.B. Ubbink, in A.P. De Leenheer, W.E. Lambert and H.J. Nelis (Editors), Modern Chromatographic Analysis of Vitamins, Marcel Dekker, New York, 2nd ed., 1992, Ch. 10, p. 399.
3. B6 vitamer analysis in human plasma by high performance liquid chromatography: a preliminary report.
4. Separation of vitamin B6 compounds by paired-ion high-performance liquid chromatography
5. A versatile cation-exchange procedure for measuring the seven major forms of vitamin B6 in biological samples