TY - JOUR AU - V. E. Shatalov TI - Dirichlet series that are composed of the eigenvalues of boundary value problems for an arbitrary second order elliptic differential operator JO - Differencialʹnye uravneniâ PY - 1972 SP - 1267 EP - 1282 VL - 8 IS - 7 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_7_a12/ LA - ru ID - DE_1972_8_7_a12 ER -