Salem Hamidi, M. ., and M. . Israeel Abid. “Classical System Development Approach: Waterfall Model”. JOURNAL OF SOFTWARE ENGINEERING TOOLS &Amp; TECHNOLOGY TRENDS, vol. 8, no. 3, Mar. 2022, pp. 8-12, https://stmcomputers.stmjournals.com/index.php/JoSETTT/article/view/177.