@article{PIM2_1983__33(47)_257664,
     author = {Torgasev, Aleksandar},
     title = {Finiteness of spectra of graphs obtained by some operations on infinite graphs.},
     journal = {Publications de l 'Institut Math\'ematique. Nouvelle S\'erie},
     pages = {227},
     publisher = {mathdoc},
     volume = {33(47)},
     year = {1983},
     zbl = {0517.05050},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/PIM2_1983__33(47)_257664/}
}