@article{VMUMM_1997_3_a11,
     author = {A. Ya. Sagomonyan},
     title = {High-speed penetration of a solid sphere into the soil},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {47--51},
     publisher = {mathdoc},
     number = {3},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1997_3_a11/}
}