1.
Rollová E, Schubert M, Steffen E. Flows in Signed Graphs with Two Negative Edges. Electron. J. Combin. [Internet]. 2018Jun.8 [cited 2026Mar.27];25(2):P2.40. Available from: https://www.combinatorics.org/ojs/index.php/eljc/article/view/v25i2p40