@article{ZVMMF_1974_14_3_a8,
     author = {R. P. Fedorenko},
     title = {The approximate solution of variational problems},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {652--668},
     publisher = {mathdoc},
     volume = {14},
     number = {3},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1974_14_3_a8/}
}