G. Krishnamoorthy, A. Perumal, C. Boovaragasamy, and G. Gnanasabai, “Comparative evaluation of hysterosalpingo contrast sonography with laparoscopy for determination of tubal patency in infertility”, Int J Reprod Contracept Obstet Gynecol, vol. 9, no. 5, pp. 2009–2013, Apr. 2020.