Galluccio A, Loebl M. On the Theory of Pfaffian Orientations. II. $T$-joins, $k$-cuts, and Duality of Enumeration. Electron. J. Combin. [Internet]. 1998May22 [cited 2026Mar.28];6(1):R7. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v6i1r7