1. Ray method of calculating wave front intensity;Alekseev,1961
2. Note on wave propagation in linearly viscoelastic media;Achenbach;Z. angew. Math. und Phys.,1967
3. On the plastic flow of Coulomb's solids beyond original failure;Jenike;J. Appl. Mech.,1959
4. On wave propagation in elastic viscoplastic media;Bykovtsev;Inzh. Zh., Mekh. Twerd. Tela,1966
5. Plastic Flow and Fracture in Solids;Thomas,1961