@article{NUMA_1970__16_132030,
     author = {T.S. CHOW and H.W. MILNES},
     title = {Numerical {Solution} of {Laplace} {Equation} for an {Annular} {Region.}},
     journal = {Numerische Mathematik},
     pages = {231--242},
     publisher = {mathdoc},
     volume = {16},
     year = {1970},
     zbl = {0203.48401},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1970__16_132030/}
}