1. Graves R, Gahan BC, Batarseh S. Drilling large diameter holes in rocks using multiple laser beams (504). In: Proceedings of the 22nd international congress on applications of lasers and electronics, Jacksonville, FL; October 2003.
2. Leong KH, Xo Z, Reed CB, Parker RA. Laser and Beam Delivery for Rock Drilling. Argonne National Laboratory, Illinois, Operated by University of Chicago for United States Department of Energy under Contracts W-31-109-Eng-38. Technology Development Division; 2003.
3. The effect of interaction time and saturation of rock on specific energy in ND:YAG laser perforating;Ahmadi;Journal of Optics and Laser Technology,2011
4. Specific energy for pulsed laser rock drilling;XU;Journal of Laser Applications,2003
5. Gahan BC. Laser Drilling: Understanding Laser/Rock Interaction Fundamentals; Gas TIPS; Spring 2002.