Meena, Naik, et al. “Comparative Study of VIA and PAP Smear As a Screening Tool for Preinvasive and Early Invasive Cervical Cancer”. International Journal of Innovative Research in Medical Science, vol. 2, no. 09, Sept. 2017, p. 1304 to 1310, doi:10.23958/ijirms/vol02-i09/12.