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@article{PIM_1982_N_S_31_45_a2, author = {Drago\v{s} Cvetkovi\'c}, title = {On {Graphs} {Whose} {Second} {Largest} {Eigenvalue} {Does} {Not} {Exceed} 1}, journal = {Publications de l'Institut Math\'ematique}, pages = {15 }, publisher = {mathdoc}, volume = {_N_S_31}, number = {45}, year = {1982}, url = {http://geodesic.mathdoc.fr/item/PIM_1982_N_S_31_45_a2/} }
Dragoš Cvetković. On Graphs Whose Second Largest Eigenvalue Does Not Exceed 1. Publications de l'Institut Mathématique, _N_S_31 (1982) no. 45, p. 15 . http://geodesic.mathdoc.fr/item/PIM_1982_N_S_31_45_a2/