Aharoni, Ron, and Daniel Soltész. “Independent Sets in the Union of Two Hamiltonian Cycles”. The Electronic Journal of Combinatorics 25, no. 4 (December 21, 2018): P4.48. Accessed March 27, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i4p48.