@article{ZVMMF_2003_43_1_a2,
     author = {O. I. Kostyukova},
     title = {Parametric optimal control problems with a variable index},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {26--41},
     publisher = {mathdoc},
     volume = {43},
     number = {1},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2003_43_1_a2/}
}