Srivarsan S., Suriya Prakash N., Shailesh M., Varunsevvel M,. “VARIED PIN ENTRY SYSTEM USING DYNAMIC PASSWORD”. Obstetrics and Gynaecology Forum, vol. 34, no. 2s, May 2024, pp. 130-4, https://www.obstetricsandgynaecologyforum.com/index.php/ogf/article/view/95.