Davies, James, and Carsten Thomassen. “Locally Hamiltonian Graphs and Minimal Size of Maximal Graphs on a Surface”. The Electronic Journal of Combinatorics 27, no. 2 (May 29, 2020): P2.25. Accessed March 28, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v27i2p25.