@article{NUMA_1990__57_6-7_133435,
     author = {R. Plato and G. Vainikko},
     title = {On the {Regularization} of {Projection} {Methods} for {Solving} {Ill-Posed} {Problems.}},
     journal = {Numerische Mathematik},
     pages = {63--79},
     publisher = {mathdoc},
     volume = {57},
     number = {6-7},
     year = {1990},
     zbl = {0675.65053},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1990__57_6-7_133435/}
}