Mehlhorn, Kurt Algorithms and Complexity, MPI for Informatics, Max Planck Society;
Mutzel, Petra Algorithms and Complexity, MPI for Informatics, Max Planck Society;
Mehlhorn, K., & Mutzel, P. (1996). On the Embedding Phase of the Hopcroft and Tarjan Planarity Testing Algorithm. Algorithmica, 16, 233-242. doi:10.1007/BF01940648.