Altshuler classified six regular graphs on the torus, but Thomassen and Negami gave different classifications for six regular graphs on the Klein bottle. In this note, we unify those two classifications, pointing out their difference and similarity.
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Kasai, Michiko; Matsumoto, Naoki; Nakamoto, Atsuhiro; Nozawa, Takayuki; Seno, Hiroki; and Takiguchi, Yosuke
"Note On 6-regular Graphs On The Klein Bottle,"
Theory and Applications of Graphs: Vol. 4
, Article 5.
Available at: https://digitalcommons.georgiasouthern.edu/tag/vol4/iss1/5