Hernández-Díaz S, Werler MM, Walker AM, Mitchell AA (November 2000). “Folic acid antagonists during pregnancy and the risk of birth defects”. 《The New England Journal of Medicine》 343 (22): 1608–1614. doi:10.1056/NEJM200011303432204. PMID11096168.
World Health Organization (2019). 《World Health Organization model list of essential medicines: 21st list 2019》. Geneva: World Health Organization. hdl:10665/325771. WHO/MVP/EMP/IAU/2019.06. License: CC BY-NC-SA 3.0 IGO.
Hernández-Díaz S, Werler MM, Walker AM, Mitchell AA (November 2000). “Folic acid antagonists during pregnancy and the risk of birth defects”. 《The New England Journal of Medicine》 343 (22): 1608–1614. doi:10.1056/NEJM200011303432204. PMID11096168.