@article{MABA_2012_26_1-2_a11,
     author = {A.-N. El-Kassar and M. Salameh and M. Bitar},
     title = {EPQ {Model} with {Imperfect} {Quality} {Raw} {Material}},
     journal = {Mathematica balkanica},
     pages = {123},
     publisher = {mathdoc},
     volume = {26},
     number = {1-2},
     year = {2012},
     url = {http://geodesic.mathdoc.fr/item/MABA_2012_26_1-2_a11/}
}