TY - JOUR AU - P. A. Mishnaevskii TI - Investigation of a second-order elliptic operator in domains with an infinite boundary by means of the operator Sturm--Liouville equation.~I JO - Differencialʹnye uravneniâ PY - 1983 SP - 445 EP - 457 VL - 19 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1983_19_3_a8/ LA - ru ID - DE_1983_19_3_a8 ER -