Zarei, Ehsan, et al. “Achievement of Health Sector Evolution Objectives in the Vaginal Delivery Promotion Plan: A Study in a Large Public Hospital in Tehran”. Journal of Behdasht Dar Arseh (i.E., Health in the Field), vol. 3, no. 2, Apr. 2016, pp. 27-32, doi:10.22037/jhf.v3i2.10295.