Excellence in Research and Innovation for Humanity
Roland Pusch and  Richard Weston,  Impact of Scale on Rock Strength.   journal   = {International Journal of Mechanical, Aerospace, Industrial, Mechatronic and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology. August 2012, vol. 68(8). 1577 - 1582[viewed 21 October 2017]. Available from: http://waset.org/publications/1445.