Bouckaert, KP; Slimani, N; Nicolas, G; Vignat, J; Wright, AJ; Roe, M; Witthöft, CM; Finglas, PM (2011). "Critical evaluation of folate data in European and international databases: recommendations for standardization in international nutritional studies". Mol Nutr Food Res. 55 (1): 166–80. doi:10.1002/mnfr.201000391. PMID21207520.
Bouckaert, KP; Slimani, N; Nicolas, G; Vignat, J; Wright, AJ; Roe, M; Witthöft, CM; Finglas, PM (2011). "Critical evaluation of folate data in European and international databases: recommendations for standardization in international nutritional studies". Mol Nutr Food Res. 55 (1): 166–80. doi:10.1002/mnfr.201000391. PMID21207520.