@article{PIM_1983_N_S_33_47_a33,
     author = {Aleksandar Torga\v{s}ev},
     title = {Finiteness of {Spectra} of {Graphs} {Obtained} by some {Operations} on {Infinite} {Graphs}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {227 },
     publisher = {mathdoc},
     volume = {_N_S_33},
     number = {47},
     year = {1983},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1983_N_S_33_47_a33/}
}