%0 Journal Article %A A. V. Karabegov %T The Uncertainty Principle for Intertwining Operators for Principal Series Representations of $\widetilde{SL(2,\mathbb{R})}$ %J Funkcionalʹnyj analiz i ego priloženiâ %D 1993 %P 76-78 %V 27 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1993_27_3_a7/ %G ru %F FAA_1993_27_3_a7