A. P. S. Narula, P. P. Doke, V. M. Vaidya, A. V. Patil, T. M. Panchanadikar, and G. N. Wagh, “Assessment of immunization among newborns: comparison between children delivered vaginally and by cesarean section”, Int J Community Med Public Health, vol. 7, no. 3, pp. 1164–1169, Feb. 2020.