Butcher, RJ, Ball, R, Hartmann, B, Currie, J & McLeay, G 2005, 'Ground Support Optimisation at Long Shaft', in Y Potvin & M Hudyma (eds), RaSiM6: Proceedings of the Sixth International Symposium on Rockburst and Seismicity in Mines Proceedings, Australian Centre for Geomechanics, Perth, pp. 511-517, https://doi.org/10.36487/ACG_repo/574_55
(https://papers.acg.uwa.edu.au/p/574_55_Butcher/)