Nahamizun Maamor, Hanita Daud, Muhammad Naeim Mohd Aris, Nor Izzati Jaini, Mahmod Othman, and Evizal Abdul Kadir, “A Comparative Study on the Performance of Covariance Functions in Gaussian Process Regression model: Application to Global Wheat Price ”, J. Adv. Res. Appl. Sci. Eng. Tech., vol. 42, no. 1, pp. 215–225, Mar. 2024.