1. Agarwal SS. Neural tube defect. A preventable congenital malformation.Indian Pediatr 1999; 36: 643–648.
2. Kulkarni ML, Mathew MA, Ramachandran B. High incidence of neural tube defects in South India.Lancet 1987; 1260.
3. Sharma AK, Upreti M, Kamboj M, Mehra P, Das K, Misra Aet al. Incidence of neural tube defects of Lucknow over a 10 year period from 1982-1991.Indian J Med Res 1994; 99: 223–226.
4. Kalra A, Kalra K, Sharma V, Singh M, Dayal RS. Congenital malformations.Indian Pediatr 1984; 21: 945–950.
5. Kulkarni ML, Mathew MA, Reddy V. The range of neural tube defects in southern India.Arch Dis Child 1989; 64: 201–204.