@article{VMUMM_1997_6_a15,
     author = {A. N. Golubyatnikov},
     title = {Affine symmetry of continuous media},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {56--59},
     year = {1997},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1997_6_a15/}
}