@article{ZVMMF_1969_9_3_a3,
     author = {B. M. Budak and E. M. Berkovich and E. N. Solov'eva},
     title = {The convergence of difference approximations for optimal control problems},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {522--547},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1969_9_3_a3/}
}