Pasaribu, U. S.; Mukhaiyar, U.; Heriawan, M. N.; Yundari, Y. Generalized Space-Time Autoregressive Modeling of the Vertical Distribution of Copper and Gold Grades With a Porphyry-Deposit Case Study. Int. J. Adv. Sci. Eng. Inf. Technol. 2022, 12, 2030-2038.