Townsend, J. H.; Davis, S. R.; MacKey, A. D.; Gregory Jf, 3rd (2004). "Folate deprivation reduces homocysteine remethylation in a human intestinal epithelial cell culture model: Role of serine in one-carbon donation". American Journal of Physiology. Gastrointestinal and Liver Physiology. 286 (4): G588-95. doi:10.1152/ajpgi.00454.2003. PMID14615285.{{cite journal}}: CS1 maint: numeric names: authors list (link)
Townsend, J. H.; Davis, S. R.; MacKey, A. D.; Gregory Jf, 3rd (2004). "Folate deprivation reduces homocysteine remethylation in a human intestinal epithelial cell culture model: Role of serine in one-carbon donation". American Journal of Physiology. Gastrointestinal and Liver Physiology. 286 (4): G588-95. doi:10.1152/ajpgi.00454.2003. PMID14615285.{{cite journal}}: CS1 maint: numeric names: authors list (link)