TY - JOUR AU - E. Kh. Khristov TI - Expansion in products of the solutions of two Sturm--Liouville problems on the semiaxis JO - Differencialʹnye uravneniâ PY - 1980 SP - 2023 EP - 2029 VL - 16 IS - 11 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1980_16_11_a12/ LA - ru ID - DE_1980_16_11_a12 ER -