TY - JOUR AU - V. A. Il'in AU - Sh. A. Alimov TI - Comment on conditions for the convergence of spectral expansions corresponding to self-adjoint extensions of elliptic operators JO - Differencialʹnye uravneniâ PY - 1972 SP - 190 VL - 8 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1972_8_1_a20/ LA - ru ID - DE_1972_8_1_a20 ER -