@article{VTAMU_2018_23_122_a19,
     author = {I. V. Gorokhova and V. I. Sumin},
     title = {About singular controls of pointwise maximum principle for optimization problem connected with {Goursat-Darboux} system},
     journal = {Vestnik rossijskih universitetov. Matematika},
     pages = {278--284},
     publisher = {mathdoc},
     volume = {23},
     number = {122},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VTAMU_2018_23_122_a19/}
}