%0 Journal Article %A B. V. Loginov %A I. V. Konopleva %A Y. B. Rousak %T Implicit operator theorems under group symmetry conditions %J The Bulletin of Irkutsk State University. Series Mathematics %D 2011 %P 31-43 %V 4 %N 1 %U http://geodesic.mathdoc.fr/item/IIGUM_2011_4_1_a3/ %G ru %F IIGUM_2011_4_1_a3