M. N. Fonseca and V. Sah, “Comparative study between sequential use of Foley catheter with vaginal misoprostol versus sequential use of oral mifepristone with vaginal misoprostol for second trimester medical abortion”, Int J Reprod Contracept Obstet Gynecol, vol. 7, no. 11, pp. 4545–4550, Oct. 2018.