@article{DAN_1964_156_4_a0,
     author = {S. I. Alber},
     title = {Higher-dimensional problems in global variational calculus},
     journal = {Doklady Akademii Nauk},
     pages = {727--730},
     publisher = {mathdoc},
     volume = {156},
     number = {4},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_156_4_a0/}
}