Sylvia C. Boyd, Joseph Cheriyan, Robert Cummings, Logan Grout, Sharat Ibrahimpur, Zoltán Szigeti, Lu Wang. A $\frac{4}{3}$-Approximation Algorithm for the Minimum 2-Edge Connected Multisubgraph Problem in the Half-Integral Case. SIAM J. Discrete Math., 36(3):1730-1747, September 2022. [doi]
Abstract is missing.