1. Prevention of neural tube defects: results of the Medical Research Council Vitamin Study;Lancet.,1991
2. Use of folic acid for prevention of spina bifida and other neural tube defects, 1983-1991;MMWR.,1992
3. Recommendations for the use of folic acid to reduce the number of spina bifida and other neural tube defects;MMWR.,1992
4. Folate fortification and neural tube defects;Nestle;J Nutr Educ.,1994
5. Food standards: amendment of standards of identity for enriched grain products to require addition of folic acid (final rule), 61 Federal Register 8781 (1996) (Codified at 21 CFR § 136,137,139).