Singh, B. P., and H. Rai. “Analyzing Menstruating Interval to the First Conception: An Application of CPH and AFT Models”. Journal of Population and Social Studies [JPSS], vol. 34, no. -, Apr. 2025, pp. 199-16, https://so03.tci-thaijo.org/index.php/jpss/article/view/280806.