The following publications are possibly variants of this publication:
- 6-Critical Graphs on the Klein BottleKen-ichi Kawarabayashi, Daniel Král, Jan Kyncl, Bernard Lidický. siamdm, 23(1):372-383, 2009. [doi]
- Five-coloring graphs on the Klein bottleNathan Chenette, Luke Postle, Noah Streib, Robin Thomas, Carl Yerger. JCT, 102(5):1067-1098, 2012. [doi]
- Coloring even-faced graphs in the torus and the Klein bottleDaniel Král, Robin Thomas. combinatorica, 28(3):325-341, 2008. [doi]
- Three-coloring Klein bottle graphs of girth fiveRobin Thomas, Barrett Walls. JCT, 92(1):115-135, 2004. [doi]
- On the orientable genus of graphs embedded in the klein bottleNeil Robertson, Robin Thomas. jgt, 15(4):407-419, 1991. [doi]