TY - JOUR AU - M. D. Bronshtein TI - Functionals containing idempotent integration and their applications to the estimation of the minimal eigenvalue of differential operators JO - Doklady Akademii Nauk PY - 1991 SP - 265 EP - 268 VL - 320 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1991_320_2_a0/ LA - ru ID - DAN_1991_320_2_a0 ER -