%0 Journal Article %A A. Sh. Shukurov %T On the number of non-real eigenvalues of the Sturm--Liouville problem %J Eurasian mathematical journal %D 2017 %P 77-84 %V 8 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/EMJ_2017_8_3_a8/ %G en %F EMJ_2017_8_3_a8