TY - JOUR AU - G. A. Kalyabin TI - Sharp estimates for derivatives of functions in the Sobolev classes $\mathring W_2^r(-1,1)$ JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 2010 SP - 143 EP - 149 VL - 269 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_2010_269_a10/ LA - ru ID - TM_2010_269_a10 ER -