@article{10_37236_3228,
     author = {Naoki Matsumoto},
     title = {The size of edge-critical uniquely 3-colorable planar graphs},
     journal = {The electronic journal of combinatorics},
     year = {2013},
     volume = {20},
     number = {3},
     doi = {10.37236/3228},
     zbl = {1295.05090},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/3228/}
}