@article{10_37236_1123,
     author = {Douglas R. Woodall},
     title = {Total 4-choosability of series-parallel graphs},
     journal = {The electronic journal of combinatorics},
     year = {2006},
     volume = {13},
     doi = {10.37236/1123},
     zbl = {1113.05040},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1123/}
}