- M. Hifi and R. M’Hallah (Guest Eds). Special Issue on Knapsack Problems and Applications. Computers & Operations Research, 2012.
- M. Hifi, I. Kacem and A. R. Mahjoub (Guest Eds). Special Issue on Polyhedra and Combinatorial Optimization. International Journal of Mathematics in Operational Research, 2012.
- H. Ait Haddadene, I. Bouchemakh and M. Hifi (Guest Eds ). Special Issue in Operations Research. Studia Informatica Universalis (HERMANN Eds), 2012.