@article{FAA_1976_10_2_a14,
     author = {B. A. Kupershmidt},
     title = {Lagrangian formalism in variational calculus},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {77--78},
     publisher = {mathdoc},
     volume = {10},
     number = {2},
     year = {1976},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1976_10_2_a14/}
}