@article{CMFD_2011_42_a19,
     author = {N. N. Subbotina and E. A. Kolpakova},
     title = {Method of characteristics for optimal control problems and conservation laws},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {204--210},
     publisher = {mathdoc},
     volume = {42},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2011_42_a19/}
}