@article{DAN_1961_137_1_a6,
     author = {V. F. Krotov},
     title = {The principle problem of the calculus of variations for the simplest functional on a set of discontinuous functions},
     journal = {Doklady Akademii Nauk},
     pages = {31--34},
     publisher = {mathdoc},
     volume = {137},
     number = {1},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_1_a6/}
}