Lo, Allan, and Viresh Patel. “Hamilton Cycles in Sparse Robustly Expanding Digraphs”. The Electronic Journal of Combinatorics 25, no. 3 (September 7, 2018): P3.44. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i3p44.