%0 Journal Article %A L. V. Fardigola %T Transformation operators and modified Sobolev spaces in controllability problems on a half-axis %J Žurnal matematičeskoj fiziki, analiza, geometrii %D 2016 %P 17-47 %V 12 %N 1 %U http://geodesic.mathdoc.fr/item/JMAG_2016_12_1_a1/ %G en %F JMAG_2016_12_1_a1