%0 Journal Article %A E. Gekeler %T A-priori Error Estimates of Galerkin Backward Differentiation Methods in Time-Inhomogeneous Parabolic Problem. %J Numerische Mathematik %D 1978 %P 369-384 %V 30 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1978__30_132557/ %F NUMA_1978__30_132557