@article{ZVMMF_1982_22_1_a2,
     author = {I. L. Barskii},
     title = {The behaviour of extremals of a variational problem with phase constraints},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {17--29},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1982_22_1_a2/}
}