Duque F, González-Aguilar H, Hernández-Vélez C, Leaños J, Medina C. The Complexity of Computing the Cylindrical and the $t$-Circle Crossing Number of a Graph. Electron. J. Combin. [Internet]. 2018Jun.8 [cited 2026Mar.27];25(2):P2.43. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i2p43