@article{SM_1993_75_2_a11,
     author = {M. A. Sychev},
     title = {On the question of regularity of the solutions of variational problems},
     journal = {Sbornik. Mathematics},
     pages = {535--556},
     publisher = {mathdoc},
     volume = {75},
     number = {2},
     year = {1993},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1993_75_2_a11/}
}