Kondo, A; Kamihira, O; Ozawa, H (January 2009). "Neural tube defects: prevalence, etiology and prevention.". International Journal of Urology16 (1): 49–57. doi:10.1111/j.1442-2042.2008.02163.x. பப்மெட்:19120526.
Castillo-Lancellotti, C; Tur, JA; Uauy, R (May 2013). "Impact of folic acid fortification of flour on neural tube defects: a systematic review.". Public Health Nutrition16 (5): 901–11. doi:10.1017/s1368980012003576. பப்மெட்:22850218.
Canfield, MA; Honein, MA; Yuskiv, N; Xing, J; Mai, CT; Collins, JS; Devine, O; Petrini, J et al. (November 2006). "National estimates and race/ethnic-specific variation of selected birth defects in the United States, 1999–2001.". Birth Defects Research. Part A, Clinical and Molecular Teratology76 (11): 747–56. doi:10.1002/bdra.20294. பப்மெட்:17051527.
Bhide, P; Sagoo, GS; Moorthie, S; Burton, H; Kar, A (July 2013). "Systematic review of birth prevalence of neural tube defects in India.". Birth Defects Research. Part A, Clinical and Molecular Teratology97 (7): 437–43. doi:10.1002/bdra.23153. பப்மெட்:23873811.
Kondo, A; Kamihira, O; Ozawa, H (January 2009). "Neural tube defects: prevalence, etiology and prevention.". International Journal of Urology16 (1): 49–57. doi:10.1111/j.1442-2042.2008.02163.x. பப்மெட்:19120526.
Castillo-Lancellotti, C; Tur, JA; Uauy, R (May 2013). "Impact of folic acid fortification of flour on neural tube defects: a systematic review.". Public Health Nutrition16 (5): 901–11. doi:10.1017/s1368980012003576. பப்மெட்:22850218.
Canfield, MA; Honein, MA; Yuskiv, N; Xing, J; Mai, CT; Collins, JS; Devine, O; Petrini, J et al. (November 2006). "National estimates and race/ethnic-specific variation of selected birth defects in the United States, 1999–2001.". Birth Defects Research. Part A, Clinical and Molecular Teratology76 (11): 747–56. doi:10.1002/bdra.20294. பப்மெட்:17051527.
Bhide, P; Sagoo, GS; Moorthie, S; Burton, H; Kar, A (July 2013). "Systematic review of birth prevalence of neural tube defects in India.". Birth Defects Research. Part A, Clinical and Molecular Teratology97 (7): 437–43. doi:10.1002/bdra.23153. பப்மெட்:23873811.