A strong flow-based formulation for the shortest path problem in digraphs with negative cycles. - Mamane Souley Ibrahim; Nelson Maculan; Michel Minoux (Int. Trans. Oper. Res., 2009)

Valid inequalities and lifting procedures for the shortest path problem in digraphs with negative cycles. - Mamane Souley Ibrahim; Nelson Maculan; Michel Minoux (Optim. Lett., 2015)

An efficient cutting plane algorithm for the minimum weighted elementary directed cycle problem in planar digraphs. - Mamane Souley Ibrahim; Nelson Maculan; Hacene Ouzia (RAIRO Oper. Res., 2016)