@article{YJOR_2018_28_4_a1,
     author = {Chandra A. Irawan and Kusmaningrum Soemadi},
     title = {The {Capacitated} {Single-Source} {P-Center} {Problem} in the {Presence} of {Fixed} {Cost} and {Multilevel} {Capacities} {Using} {VNS} and {Aggregation} {Technique}},
     journal = {Yugoslav journal of operations research},
     pages = {453 - 473},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2018},
     url = {https://geodesic-test.mathdoc.fr/item/YJOR_2018_28_4_a1/}
}