@article{PIM2_1998__63(77)_258079,
     author = {Lepovi\'c, Mirko},
     title = {On formal products and the {Seidel} spectrum of graphs.},
     journal = {Publications de l 'Institut Math\'ematique. Nouvelle S\'erie},
     pages = {37},
     publisher = {mathdoc},
     volume = {63(77)},
     year = {1998},
     zbl = {0942.05038},
     language = {en},
     url = {https://geodesic-test.mathdoc.fr/item/PIM2_1998__63(77)_258079/}
}