@article{NUMA_1972__19_132153,
     author = {J.G. Pierce and J.W. Dailey},
     title = {Error {Bounds} for the {Galerkin} {Method} {Applied} to {Singular} and {Nonsingular} {Boundary} {Value} {Problems.}},
     journal = {Numerische Mathematik},
     pages = {266--282},
     publisher = {mathdoc},
     volume = {19},
     year = {1972},
     zbl = {0244.65075},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1972__19_132153/}
}