De Loera Chávez, Javier. “A Determinantal Formula for Cluster Variables in Cluster Algebras from Surfaces”. The Electronic Journal of Combinatorics 33, no. 3 (August 7, 2026): #P3.35. Accessed August 8, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v33i3p35.