[1]
S. A. Al Fadhel, A. A.-S. Al-khadir, and O. M. M. Al - Zobaie, “Modeling the Gas price data Using Periodogram and Fourier Series Analysis”, JNSLAS, vol. 3, no. 1, pp. 37–23, Mar. 2019, doi: 10.26389/AJSRP.F300119.