TY - JOUR AU - S. V. Frolov TI - The perturbation of the surface density of electronic states by point defect~-- the connection with the topology of the isoenergetic curve JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1996 SP - 306 EP - 314 VL - 106 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1996_106_2_a10/ LA - ru ID - TMF_1996_106_2_a10 ER -