@article{10_4153_CJM_1990_039_3,
     author = {Kwak, Jin Ho and Lee, Jaeun},
     title = {Isomorphism {Classes} of {Graph} {Bundles}},
     journal = {Canadian journal of mathematics},
     pages = {747--761},
     year = {1990},
     volume = {42},
     number = {4},
     doi = {10.4153/CJM-1990-039-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-039-3/}
}