Lawson, John W. “Cluster Automorphisms and the Marked Exchange Graphs of Skew-Symmetrizable Cluster Algebras”. The Electronic Journal of Combinatorics 23, no. 4 (December 9, 2016): #P4.41. Accessed May 30, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i4p41.