Shaik Heena, T Jaya sri, V Ramya, Shaik Sheema, D Karunamma. “Online Correspondence Hard Sell Ranking Using Expert System and Development of ’Thinking’ Computer Systems”. Mathematical Statistician and Engineering Applications 68, no. 1 (December 31, 2019): 129–140. Accessed July 3, 2024. https://philstat.org/index.php/MSEA/article/view/1826.