%0 Journal Article %A J. jr. DOUGLAS %A J.E. GUNN %T A General Formulation of Alternating Direction Methods. Part I. Parabolic and Hyperbolic Problems. %J Numerische Mathematik %D 1964 %P 428-453 %V 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/NUMA_1964__6_131630/ %F NUMA_1964__6_131630