@article{ASUO_2012_XX_2_a17,
     author = { L\'aszl\'o L. Stach\'o and Wend Werner },
     title = { On non-commutative
                            {Minkowski} spheres },
     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_a17/}
}