TY - JOUR AU - S. S. Grigoryan TI - On the nature of “super deep” penetration of solid microparticles in hard materials JO - Doklady Akademii Nauk PY - 1987 SP - 1319 EP - 1323 VL - 292 IS - 6 UR - http://geodesic.mathdoc.fr/item/DAN_1987_292_6_a9/ LA - ru ID - DAN_1987_292_6_a9 ER -