%0 Journal Article %A A. Laptev %T The Negative Spectrum of a Class of Two-Dimensional Schr\"odinger Operators with Potentials Depending Only on Radius %J Funkcionalʹnyj analiz i ego priloženiâ %D 2000 %P 85-87 %V 34 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_2000_34_4_a9/ %G ru %F FAA_2000_34_4_a9