@article{DAN_1987_292_6_a9,
     author = {S. S. Grigoryan},
     title = {On the nature of {\textquotedblleft}super deep{\textquotedblright} penetration of solid microparticles in hard materials},
     journal = {Doklady Akademii Nauk},
     pages = {1319--1323},
     year = {1987},
     volume = {292},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1987_292_6_a9/}
}