Prengki I, Dwinagara B, Koesnaryo S, Saptono S, Winarno E. Analysis of Stress and Pillar Strength in Underground Coal Mines. SENJOP [Internet]. 2023 Jun. 10 [cited 2026 Apr. 17];5(2):83-91. Available from: http://senjop.ppj.unp.ac.id/index.php/senjop/article/view/188