et. al., Syif Ali Abd Al-Rzaq,. “Using the Samuelson Model to Assess the French Economy’s Business Cycle: A Mathematical Study”. Turkish Journal of Computer and Mathematics Education (TURCOMAT), vol. 12, no. 7, Apr. 2021, pp. 3242-9, https://turcomat.org/index.php/turkbilmat/article/view/4401.