@article{Cvetkovi__1993,
    doi = {10.1016/0024-3795(93)90491-6},
    url = {https://doi.org/10.1016%2F0024-3795%2893%2990491-6},
    year = {1993},
    month = {mar},
    publisher = {Elsevier {BV}},
    volume = {182},
    pages = {45--66},
    author = {Drago{\v{s}} Cvetkovi{\'{c}} and Peter Rowlinson and Slobodan Simi{\'{c}}},
    title = {A study of eigenspaces of graphs},
    journal = {Linear Algebra and its Applications}
}

@article{Cvetkovi__1993, doi = {10.1016/0024-3795(93)90491-6}, url = {https://doi.org/10.1016%2F0024-3795%2893%2990491-6}, year = {1993}, month = {mar}, publisher = {Elsevier {BV}}, volume = {182}, pages = {45--66}, author = {Drago{\v{s}} Cvetkovi{\'{c}} and Peter Rowlinson and Slobodan Simi{\'{c}}}, title = {A study of eigenspaces of graphs}, journal = {Linear Algebra and its Applications} }