Khatoon, F., A. Nigam, N. R. Sharma, R. Srivastava, R. Sangal, and N. Malik. “Prevalence and Risk Factors for Group B Streptococcal Colonization in Pregnant Women in Northern India”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 5, no. 12, Dec. 2016, pp. 4361-4, doi:10.18203/2320-1770.ijrcog20164343.