1. Cox, Allan, and R. B. Hart, 1986, Plate tectonics; how it works: Boston, Blackwell Scientific Publications.
2. HSI, 2008, Haynesville Shale Well: Louisiana, USA, web document (http://www.horizontalsi.com/media/default/pdfs/haynesvilles.pdf).
3. A Systematic Approach to Well Surveying Calculations
4. Tearpock, D.J., and R.E. Bischke, 1991, Applied Surface Geological Mapping, Prentice-Hall, Inc. Englewood Cliffs, New Jersey.