P. H. Khakhla, R. Anand, J. G. Sharma, and B. B. Boghara, “Role of cytology, colposcopy and biopsy in the detection of cervical intraepithelial neoplasia”, Int J Reprod Contracept Obstet Gynecol, vol. 2, no. 4, pp. 550–554, Dec. 2016.