Two-Connected Spanning Subgraphs with at Most $\frac{10}{7}{OPT}$ Edges

Klaus Heeger, Jens Vygen. Two-Connected Spanning Subgraphs with at Most $\frac{10}{7}{OPT}$ Edges. SIAM J. Discrete Math., 31(3):1820-1835, 2017. [doi]