@article{10_4153_CMB_1971_037_7,
     author = {Sekanina, Milan},
     title = {On an {Algorithm} for {Ordering} of {Graphs}},
     journal = {Canadian mathematical bulletin},
     pages = {221--224},
     year = {1971},
     volume = {14},
     number = {2},
     doi = {10.4153/CMB-1971-037-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-037-7/}
}