@article{RO_2007__41_1_61_0,
     author = {Azaron, Amir and Sakawa, Masatoshi and Tavakkoli-Moghaddam, Reza and Safaei, Nima},
     title = {A discrete-time approximation technique for the time-cost trade-off in {PERT} networks},
     journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
     pages = {61--81},
     publisher = {EDP-Sciences},
     volume = {41},
     number = {1},
     year = {2007},
     doi = {10.1051/ro:2007005},
     mrnumber = {2310540},
     language = {en},
     url = {http://archive.numdam.org/articles/10.1051/ro:2007005/}
}