H
[HT74] John Hopcroft and Robert Endre Tarjan. Efficient Planarity Testing. Journal of the ACM 21(4):549-568. ACM Press, October 1974. 
@article{jacm21(4)-HT,
  author =              {Hopcroft, John and Tarjan, Robert Endre},
  title =               {Efficient Planarity Testing},
  publisher =           {ACM Press},
  journal =             {Journal of the~ACM},
  volume =              {21},
  number =              {4},
  pages =               {549-568},
  year =                {1974},
  month =               oct,
}
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