@article{DAN_1965_163_2_a13,
     author = {K. P. Surovikhin},
     title = {The invariant meaning of {Riemann's} invariants},
     journal = {Doklady Akademii Nauk},
     pages = {319--322},
     publisher = {mathdoc},
     volume = {163},
     number = {2},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_163_2_a13/}
}