@article{SM_1983_46_1_a1,
     author = {Yu. P. Pyt'ev},
     title = {Pseudoinverse operators. {Properties} and applications},
     journal = {Sbornik. Mathematics},
     pages = {17--50},
     publisher = {mathdoc},
     volume = {46},
     number = {1},
     year = {1983},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1983_46_1_a1/}
}