@article{VSGU_2011_8_a1,
     author = {A. V. Boluchevskaya},
     title = {Smooth approximation for the solutions of elliptic systems},
     journal = {Vestnik Samarskogo universiteta. Estestvennonau\v{c}na\^a seri\^a},
     pages = {21--28},
     year = {2011},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGU_2011_8_a1/}
}