@article{ZVMMF_1974_14_3_a22,
     author = {B. M. Budak and Yu. L. Gaponenko and G. Yu. Malysheva and P. I. Ruban},
     title = {A certain method for the solution of extremal problems with constraints on the phase coordinates},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {779--783},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1974_14_3_a22/}
}