A matheuristic approach for the maximum balanced subgraph of a signed graph Jorge Reynaldo Moreno Ramírez, Yuri Abitbol de Menezes Frota and Simone de Lima Martins RAIRO-Oper. Res., 55 5 (2021) 3121-3140 Published online: 21 October 2021 DOI: 10.1051/ro/2021150