Bao, Bo, Rong Chen, and Genghua Fan. “Circuit Covers of Signed Eulerian Graphs”. The Electronic Journal of Combinatorics 28, no. 1 (January 29, 2021): P1.14. Accessed March 17, 2026. https://www.combinatorics.org/ojs/index.php/eljc/article/view/v28i1p14.