D. Ariyanto, A. Sofro, R. D. I. Puspitasari, R. W. Romadhonia, and H. Ombao, “SPATIAL INTERPOLATION OF RAINFALL DATA USING COKRIGING AND RECURRENT NEURAL NETWORKS FOR HYDROLOGICAL APPLICATIONS IN SURABAYA, INDONESIA”, BAREKENG: J. Math. & App., vol. 20, no. 2, pp. 1185–1198, Jan. 2026.