%0 Journal Article %A Yu. A. Ashrafyan %A T. N. Harutyunyan %T On a property of norming constants of Sturm–Liouville problem %J Proceedings of the Yerevan State University. Physical and mathematical sciences %D 2014 %P 3-7 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZERU_2014_3_a0/ %G en %F UZERU_2014_3_a0