1. Abou-matar H. (1990). “Evaluation of dynamic measurements on the standard penetration test ” Thesis presented to the Univ. of Colorado at Boulder in partial fulfillment of the degree of MS.
2. Chen C. (1990). “Energy transfer in the standard penetration test ” Thesis presented to the Univ. of Colorado at Boulder in partial fulfillment of the degree of MS.
3. Fairhurst C. (1961). “Wave mechanics of percussive drilling.” Mine and Quarry Engrg. (March) 122–130.
4. Fairhurst C. (1961). “Wave mechanics of percussive drilling.” Mine and Quarry Engrg. (April) 167–178.
5. Fairhurst C. (1961). “Wave mechanics of percussive drilling.” Mine and Quarry Engrg. (July) 327–328.