%0 Journal Article %A M. Yu. Kokurin %T On the regularization of singular optimal control problems for linear equations with selfadjoint operators %J Differencialʹnye uravneniâ %D 1997 %P 249-256 %V 33 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1997_33_2_a14/ %G ru %F DE_1997_33_2_a14