Nimaje, D. S., and S. Sai. “DEVELOPMENT OF SOFTWARE TO EVALUATE ROOF FALL RISK IN BORD AND PILLAR METHOD - DEPILLARING PHASE”. GeoScience Engineering, vol. 61, no. 2, June 2015, pp. 14-22, https://geoscience.cz/ojs/index.php/GSE/article/view/81.