%0 Journal Article %A E. Kh. Khristov %T Expansion in products of the solutions of two Sturm--Liouville problems on the semiaxis %J Differencialʹnye uravneniâ %D 1980 %P 2023-2029 %V 16 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_1980_16_11_a12/ %G ru %F DE_1980_16_11_a12