%0 Journal Article %A È. R. Tsekanovskii %A Yu. L. Shmul'yan %T Questions in the theory of the extension of unbounded operators in rigged Hilbert spaces %J Itogi nauki i tehniki. Seriâ, Matematičeskij analiz %D 1977 %P 59-100 %V 14 %I mathdoc %U http://geodesic.mathdoc.fr/item/INTM_1977_14_a1/ %G ru %F INTM_1977_14_a1