Fialko, Sergej Max Planck Society;
Mutzel, Petra Algorithms and Complexity, MPI for Informatics, Max Planck Society;
Fialko, S., & Mutzel, P. (1998). A New Approximation Algorithm for the Planar Augmentation Problem. In Proceedings of the 9th Annual ACM-SIAM Symposium on Discrete Algorithms (pp. 260-269). New York, USA: ACM Press / SIAM.