@article{GDZPPN001171372, title = {A Numerical Method for Solving Singular Boundary Value Problems.}, journal = {Numerische Mathematik}, volume = {21}, year = {1973}, pages = {328-344}, zbl = {0255.65032}, url = {http://dml.mathdoc.fr/item/GDZPPN001171372} }
Gustafsson, Bertil. A Numerical Method for Solving Singular Boundary Value Problems.. Numerische Mathematik, Tome 21 (1973) pp. 328-344. http://gdmltest.u-ga.fr/item/GDZPPN001171372/