1. Bourgoyne AT, Chenevert ME, Millhein KK (1986) Applied drilling engineering. Textbook Series, SPE, Richardson, pp 246–348
2. Gutierrez JJ, Vallejo et al. (2010) Impact of longwall mining on highways. Paper ARMA 10-151 presented at the 44th US Rock Mechanics Symposium and 5th US–Canada Rock Mechanics Symposium, Salt Lake City
3. Peng (2008) Coal mine ground control. Department of Mining Engineering, West Virginia University, USA
4. Rostami J, Elsworth D, Watson R (2012) Study of borehole stability for gas wells in longwall mining areas. Pennsylvania State University, State College, Pennsylvania