1. Mechanical properties and drillability of rocks;Protodyakonov,1962
2. Drillability studies—laboratory percussive drilling;Paone;U.S. Bur. Mines, Rept Inv. 7300,1969
3. Laboratory course in rock mechanics;Panin,1967
4. Disintegration of rock by high pressure jets;Summers;Ph.D. Thesis, Leeds University,1968
5. Prediction of penetration rate for percussive drilling;Selim;U.S. Bur. Mines Rept Inv. 7396,1970