P. C. Giraldo, A. M. D. Fachini, R. T. Pereira, S. Pereira, A. V. Nowakonski, and M. R. L. Passos, “Lackof lactobacillus sp in the vaginal flora during the labor of women endingin preterm deliveries”, DST, vol. 18, no. 3, pp. 200–203, Oct. 2006.