@article{GDZPPN001170481,
title = {Error Bounds for the Galerkin Method Applied to Singular and Nonsingular Boundary Value Problems.},
journal = {Numerische Mathematik},
volume = {19},
year = {1972},
pages = {266-282},
zbl = {0244.65075},
url = {http://dml.mathdoc.fr/item/GDZPPN001170481}
}
Pierce, J.G.; Dailey, J.W. Error Bounds for the Galerkin Method Applied to Singular and Nonsingular Boundary Value Problems.. Numerische Mathematik, Tome 19 (1972) pp. 266-282. http://gdmltest.u-ga.fr/item/GDZPPN001170481/