TY - JOUR AU - R. Rannacher AU - H. Blum TI - Extrapolation Techniques for Reducing the Pollution Effect of Reentrant Corners in the Finite Element Method. JO - Numerische Mathematik PY - 1987 SP - 539 EP - 564 VL - 52 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/NUMA_1987__52_5_133252/ ID - NUMA_1987__52_5_133252 ER -