@article{NUMA_1962__4_131540,
     author = {J.H. BRAMBLE and B.E. HUBBARD},
     title = {On the {Formulation} of finite {Difference} analogues of the {Dirichlet} {Problem} for {Poisson's} {Equation.}},
     journal = {Numerische Mathematik},
     pages = {313--329},
     publisher = {mathdoc},
     volume = {4},
     year = {1962},
     zbl = {0135.18102},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1962__4_131540/}
}