Pytel, W & Butra, J 2010, 'Mine workings design in regional pillar mining conditions — a case study from a Polish copper mine', in M Van Sint Jan & Y Potvin (eds), Deep Mining 2010: Proceedings of the Fifth International Seminar on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 89-104, https://doi.org/10.36487/ACG_repo/1074_06
(https://papers.acg.uwa.edu.au/p/1074_06_Pytel/)