1. Extension of the upper bound method to include estimation of stresses;Azarkhin;J. Appl. Mech.,1991
2. V.V. Sokolovskii, Equations of plastic flow in surface layer, Prikladnay Matematika i Mechanicka (PMM) 20 (1956) 328, (in Russian).
3. S.E. Alexandrov, B.A. Druyanov, Friction conditions for plastic bodies, Izv. AN SSSR MTT (Mech. of Solids). 27 (4) (1992) 110, [Trans. from Russian].
4. S.E. Alexandrov, Discontinuous velocity fields due to arbitrary strains in an ideal rigid-plastic body, Sov. Phys. Dokl. 37 (6) (1992) 283, [Trans. from Russian].
5. S.E. Alexandrov, Velocity field near its discontinuity in an arbitrary flow of an ideal rigid-plastic material, Izv. RAN MTT (Mech. Solids) 30 (5) (1995) 111, [Trans. from Russian].