Nur Ali Amri, Septi Wulandari, Tedy Agung Cahyadi, Inmarlinianto, and Satria Abadi. “Distance of Drill-Hole Determination Based on Global Estimation Variance of Coal Resources Classification”. Journal of Advanced Research in Applied Sciences and Engineering Technology, vol. 33, no. 1, Oct. 2023, pp. 267-74, doi:10.37934/araset.33.1.267274.