Purnamasari, Ika, Toha Saifudin, Sri Wahyuningsih, and M. Fariz Fadillah Mardianto. “Stock Price Modelling of Ciputra Development Tbk. (CTRA) Using Fourier Series”. Journal of Applied Informatics and Computing 10, no. 3 (June 18, 2026): 2997–3004. Accessed September 12, 2026. https://jurnal.polibatam.ac.id/index.php/JAIC/article/view/13093.