@article {IOPORT.50245149,
    author       = {Hifi, Mhand and M'hallah, Rym},
    title        = {Special issue on knapsack problems and applications},
    year         = {2012},
    journal      = {Computers & OR},
    volume       = {39},
    number       = {1},
    pages        = {1-2},
    doi          = {10.1016/j.cor.2011.04.011},
    identifier   = {50245149},
}