TY - JOUR AU - Lin Qun TI - Fourth order eigenvalue approximation by extrapolation on domains with reentrant corners. JO - Numerische Mathematik PY - 1990 SP - 631 EP - 640 VL - 58 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/NUMA_1990__58_5_133521/ ID - NUMA_1990__58_5_133521 ER -