TY - JOUR AU - M. I. Monastyrsky TI - Hecke graphs, Ramanujan graphs and generalized duality transformations for lattice spin systems JO - Trudy Matematicheskogo Instituta imeni V.A. Steklova PY - 2011 SP - 295 EP - 300 VL - 275 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TM_2011_275_a18/ LA - en ID - TM_2011_275_a18 ER -