“Pemetaan Sebaran Kadar Besi Pada Endapan Laterit Nikel Menggunakan Metode Interpolasi Indikator Kriging dan Ordinary Kriging: Mapping The Distribution of Iron Content in Nickel Laterite Deposits Using Indicator Kriging and Ordinary Kriging Interpolation Method”, PROMINE, vol. 9, no. 1, pp. 29–36, Sep. 2021, doi: 10.33019/promine.v9i1.2316.