TY - JOUR AU - Korotov, Sergey TI - Two-sided a posteriori error estimates for linear elliptic problems with mixed boundary conditions JO - Applications of Mathematics PY - 2007 SP - 235 EP - 249 VL - 52 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1007/s10492-007-0012-7/ DO - 10.1007/s10492-007-0012-7 LA - en ID - 10_1007_s10492_007_0012_7 ER -