%0 Journal Article %A G. A. Aigunov %T On the boundedness problem for the set of orthonormal eigenfunctions for a class of Sturm–Liouville operators with a weight function of unbounded variation on a finite interval %J Matematičeskie zametki %D 1996 %P 434-437 %V 60 %N 3 %U http://geodesic.mathdoc.fr/item/MZM_1996_60_3_a10/ %G ru %F MZM_1996_60_3_a10