@article{ASUO_2012_XX_2_a7,
     author = { Alexandru Bobe and Wladimir G. Boskoff and Marian G. Ciuc\u{a} },
     title = { Tzitzeica-Type
                            centro-affine invariants in {Minkowski} spaces },
     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_a7/}
}