@article{10_37236_7320,
     author = {Margit Voigt and Arnfried Kemnitz},
     title = {A note on not-4-list colorable planar graphs},
     journal = {The electronic journal of combinatorics},
     year = {2018},
     volume = {25},
     number = {2},
     doi = {10.37236/7320},
     zbl = {1388.05048},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/7320/}
}