@article{KUKZ_1983_20_20_a18,
     author = {I. E. Pleshchinskaya},
     title = {A problem of optimal control for a system of equations of mixed type},
     journal = {Trudy seminara po kraevym zada\v{c}am},
     pages = {171--184},
     publisher = {mathdoc},
     volume = {20},
     number = {20},
     year = {1983},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/KUKZ_1983_20_20_a18/}
}