@article{SEMR_2013_10_a49,
     author = {A. I. Parfenov},
     title = {Error bound for a generalized {M.} {A.~Lavrentiev's} formula via the norm in a fractional {Sobolev} space},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {335--377},
     year = {2013},
     volume = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2013_10_a49/}
}