@article{NUMA_1973__21_132225,
     author = {G.W. Reddien},
     title = {Projection {Methods} and {Singular} {Two} {Point} {Boundary} {Value} {Problems.}},
     journal = {Numerische Mathematik},
     pages = {193--205},
     publisher = {mathdoc},
     volume = {21},
     year = {1973},
     zbl = {0281.65048},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1973__21_132225/}
}