@article{ASUO_2012_XX_2_a19,
     author = { Jo\"el Rouyer and Costin V{\^\i}lcu },
     title = { Sets of tetrahedra, defined by maxima
                            of distance functions },
     journal = {Analele Universit\u{a}\c{t}ii "Ovidius" Constan\c{t}a Seria Matematic\u{a}},
     publisher = {mathdoc},
     volume = {XX},
     number = {2},
     year = {2012},
     url = {http://geodesic.mathdoc.fr/item/ASUO_2012_XX_2_a19/}
}