Speyer DE. Variations on a theme of Kasteleyn, with Application to the Totally Nonnegative Grassmannian. Electron. J. Combin. [Internet]. 2016Apr.29 [cited 2026May15];23(2):#P2.24. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v23i2p24