@misc{10_4153_CMB_1973_047_4,
     title = {On {Cycles} and {Connectivity} in {Planar} {Graphs}},
     journal = {Canadian mathematical bulletin},
     pages = {283--288},
     year = {1973},
     volume = {16},
     number = {2},
     doi = {10.4153/CMB-1973-047-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1973-047-4/}
}