@article{10_37236_2589,
     author = {Danjun Huang and Weifan Wang},
     title = {Planar graphs of maximum degree six without 7-cycles are class one},
     journal = {The electronic journal of combinatorics},
     year = {2012},
     volume = {19},
     number = {3},
     doi = {10.37236/2589},
     zbl = {1252.05063},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/2589/}
}