TY - JOUR AU - S. V. Savchenko TI - On the ground state of free and random discrete Hamiltonians perturbed by an operator of rank one for a critical value of the coupling constant JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1998 SP - 94 EP - 103 VL - 114 IS - 1 UR - http://geodesic.mathdoc.fr/item/TMF_1998_114_1_a3/ LA - ru ID - TMF_1998_114_1_a3 ER -