TY - JOUR AU - Aleksandar Torgašev TI - Finiteness of Spectra of Graphs Obtained by some Operations on Infinite Graphs JO - Publications de l'Institut Mathématique PY - 1983 SP - 227 VL - _N_S_33 IS - 47 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PIM_1983_N_S_33_47_a33/ LA - en ID - PIM_1983_N_S_33_47_a33 ER -