Patel, N. G., M. S. Patel, S. R. Shah, S. K. Jani, J. A. Patel, and J. U. Shah. “Study of Outcome of Pregnancy in Patients With First-Trimester Bleeding Per Vaginum”. International Journal of Advances in Medicine, vol. 1, no. 3, Feb. 2017, pp. 230-3, https://www.ijmedicine.com/index.php/ijam/article/view/485.