@article{TM_2010_269_a10,
     author = {G. A. Kalyabin},
     title = {Sharp estimates for derivatives of functions in the {Sobolev} classes $\mathring W_2^r(-1,1)$},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {143--149},
     publisher = {mathdoc},
     volume = {269},
     year = {2010},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2010_269_a10/}
}