@article{MZM_1992_52_5_a14,
     author = {F. Zh. Sadyrbaev},
     title = {Regularity of solutions in the fundamental problem of the classical calculus of variations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {97--101},
     year = {1992},
     volume = {52},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1992_52_5_a14/}
}