TY - JOUR AU - A. D. Ventcel TI - On the asymptotic behavior of the greatest eigenvalue of a second-order elliptic differential operator with a small parameter in the higher derivatives JO - Doklady Akademii Nauk PY - 1972 SP - 19 EP - 22 VL - 202 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1972_202_1_a3/ LA - ru ID - DAN_1972_202_1_a3 ER -