van Aardt S, Burger A, Dunbar J, Frick M, Harris J, Singleton J. An Iterative Approach to the Traceability Conjecture for Oriented Graphs. Electron. J. Combin. [Internet]. 2013Mar.24 [cited 2026Apr.29];20(1):#P59. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v20i1p59