Mohar B, Škoda P. Minimizing the Number of Label Transitions Around a Nonseparating Vertex of a Planar Graph. JGAA [Internet]. 2012 Jan. 1 [cited 2025 Jun. 17];16(2):225-41. Available from: https://jgaa-v4.cs.brown.edu/index.php/jgaa/article/view/paper256