1. Basu TK, Dickerson JWT (1996) Vitamins in human health and disease. CAB International, Wallingford, UK
2. Zenkevich IG, Kosman VM, Makarov VG, Dadali YV (2001) J Appl Chem 74:1034–1039
3. Parris NA (1978) J Chromatogr 157:161–170
4. Reuvers Th, Pozuelo M, Jiménez R(1982) Bol CENAN 10:3–6
5. Rettenmaier R, Schüep W (1992) Int J Vitam Nutr Res 62:312–317