TY - JOUR AU - Michal Krizek AU - Pekka Neittaanmäki TI - Superconvergence Phenomenon in the Finite Element Method Arising from Averaging Gradients. JO - Numerische Mathematik PY - 1984 SP - 105 EP - 116 VL - 45 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/NUMA_1984__45_132955/ ID - NUMA_1984__45_132955 ER -