@article{DAN_1961_140_1_a9,
     author = {M. K. Kerimov},
     title = {On the theory of the second variation for discontinuous variational problems in space},
     journal = {Doklady Akademii Nauk},
     pages = {41--44},
     publisher = {mathdoc},
     volume = {140},
     number = {1},
     year = {1961},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_140_1_a9/}
}