%0 Journal Article %A Yu. P. Pyt'ev %T Pseudoinverse operators. Properties and applications %J Sbornik. Mathematics %D 1983 %P 17-50 %V 46 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1983_46_1_a1/ %G en %F SM_1983_46_1_a1