TY - JOUR AU - R. R. Gadyl'shin TI - Characteristic frequencies of bodies with thin spikes.~I. Convergence and estimates JO - Matematičeskie zametki PY - 1993 SP - 10 EP - 21 VL - 54 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_1993_54_6_a1/ LA - ru ID - MZM_1993_54_6_a1 ER -