TY - JOUR AU - C.A. Hall AU - R.E. Carlson TI - Ritz Approximations to Two-Dimensional Boundary Value Problems. JO - Numerische Mathematik PY - 1971 SP - 171 EP - 181 VL - 18 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/NUMA_1971__18_132100/ ID - NUMA_1971__18_132100 ER -