@article{DAN_1972_207_4_a0,
     author = {V. V. Velichenko},
     title = {On a generalization of {Weierstrass} method to nonclassical variational problems},
     journal = {Doklady Akademii Nauk},
     pages = {769--772},
     publisher = {mathdoc},
     volume = {207},
     number = {4},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_207_4_a0/}
}