@article{CMJ_2004_54_4_a19,
     author = {Chen, Zhibo},
     title = {Spectra of extended double cover graphs},
     journal = {Czechoslovak Mathematical Journal},
     pages = {1077--1082},
     year = {2004},
     volume = {54},
     number = {4},
     mrnumber = {2100015},
     zbl = {1080.05516},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2004_54_4_a19/}
}