1. Analysis of vitamin B12 in milk by a radioisotope dilution assay;Andersson;Milchwissenschaft,1990
2. Official Methods of Analysis;AOAC,1984
3. Improved liquid chromatographic determination of riboflavin in milk and dairy products;Ashoor;J. AOAC,1985
4. Liquid chromatographic determination of thiamine in infant formula products by using ultraviolet detection;Ayi;J. AOAC,1985
5. Routine microbiological assay for myoinositol for clinical use;Baker;J. Micronut. Anal.,1990