@article{RO_2019__53_4_1279_0,
     author = {Mejri, Imen and Haouari, Mohamed and Layeb, Safa Bhar and Mansour, Farah Zeghal},
     title = {An exact approach for the multicommodity network optimization problem with a step cost function},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {1279--1295},
     publisher = {EDP-Sciences},
     volume = {53},
     number = {4},
     year = {2019},
     doi = {10.1051/ro/2019017},
     mrnumber = {3989212},
     zbl = {1425.90126},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/ro/2019017/}
}