1. Arora, S., Rao, S., Vazirani, U.: Expander flows, geometric embeddings and graph partitioning. J. ACM 56, 5:1–5:37 (2009)
2. Bienstock, D., Monma, C.L.: On the complexity of embedding planar graphs to minimize certain distance measures. Algorithmica 5(1), 93–109 (1990)
3. Lecture Notes in Computer Science;S. Cabello,2009
4. Cabello, S., Mohar, B.: Adding one edge to planar graphs makes crossing number hard. In: Proc. SoCG 2010, pp. 68–76. ACM, New York (2010)
5. Chimani, M.: Computing Crossing Numbers. PhD thesis, TU Dortmund, Germany (2008), http://www.ae.uni-jena.de/alenmedia/dokumente/ComputingCrossingNumbers_PhDthesis_Chimani_pdf.pdf