Shah, Jalal, Nazri Kama, and Amelia Zahari. “An Empirical Study With Function Point Analysis for Requirement Changes During Software Development Phase”. International Journal of Engineering & Technology 7, no. 4.28 (November 30, 2018): 151–154. Accessed April 28, 2024. https://www.sciencepubco.com/index.php/ijet/article/view/22570.