TY - JOUR AU - Karátson, János AU - Korotov, Sergey TI - Sharp upper global a posteriori error estimates for nonlinear elliptic variational problems JO - Applications of Mathematics PY - 2009 SP - 297 EP - 336 VL - 54 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1007/s10492-009-0020-x/ DO - 10.1007/s10492-009-0020-x LA - en ID - 10_1007_s10492_009_0020_x ER -