@article{NUMA_1977__29_132523,
     author = {A.S.L. Shieh},
     title = {On the {Convergence} of the {Conjugate} {Gradient} {Method} for {Singular} {Capacitance} {Matrix} {Equations} from the {Neumann} {Problem} of the {Poisson} {Equation.}},
     journal = {Numerische Mathematik},
     pages = {307--328},
     publisher = {mathdoc},
     volume = {29},
     year = {1977},
     zbl = {0425.65055},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1977__29_132523/}
}