1. Theory of the Basic Mechanics of Coal Ploughing;Evans,1962
2. A laboratory study of the effect of cutting speed on the performance of two coal cutter picks;Pomeroy;Colliery Engng,1963
3. A laboratory study of the effect of cutting speed on the performance of two coal cutter picks;Pomeroy;Colliery Engng,1963
4. Rock Fracture around Mining Excavations;Hoek,1964
5. Friction process on cutting tool and cutting mechanism;Sada,1955