@article{JCA_2008_15_1_JCA_2008_15_1_a3,
     author = {A. N. Zachos and G. Zouzoulas},
     title = {The {Weighted} {Fermat-Torricelli} {Problem} and an {"Inverse"} {Problem}},
     journal = {Journal of convex analysis},
     pages = {55--62},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2008},
     url = {http://geodesic.mathdoc.fr/item/JCA_2008_15_1_JCA_2008_15_1_a3/}
}