@article{NUMA_1964__6_131630,
     author = {J. jr. DOUGLAS and J.E. GUNN},
     title = {A {General} {Formulation} of {Alternating} {Direction} {Methods.}  {Part} {I.}  {Parabolic} and {Hyperbolic} {Problems.}},
     journal = {Numerische Mathematik},
     pages = {428--453},
     publisher = {mathdoc},
     volume = {6},
     year = {1964},
     zbl = {0141.33103},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1964__6_131630/}
}