TY - JOUR AU - T. O. Shaposhnikova TI - Asymptotic estimates of the convergence of the Ritz method in the eigenvalue problem for a degenerate elliptic operator JO - Differencialʹnye uravneniâ PY - 1973 SP - 709 EP - 716 VL - 9 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DE_1973_9_4_a14/ LA - ru ID - DE_1973_9_4_a14 ER -