TY - JOUR AU - Mejri, Imen AU - Haouari, Mohamed AU - Layeb, Safa Bhar AU - Mansour, Farah Zeghal TI - An exact approach for the multicommodity network optimization problem with a step cost function JO - RAIRO - Operations Research - Recherche Opérationnelle PY - 2019 SP - 1279 EP - 1295 VL - 53 IS - 4 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/ro/2019017/ DO - 10.1051/ro/2019017 LA - en ID - RO_2019__53_4_1279_0 ER -