@article{JGG_2015_19_2_JGG_2015_19_2_a0,
     author = {U. B�sel and H. Dirnb�ck },
     title = {The {Extended} {Oloid} and {Its} {Contacting} {Quadrics}},
     journal = {Journal for geometry and graphics},
     pages = {161--177},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {2015},
     url = {http://geodesic.mathdoc.fr/item/JGG_2015_19_2_JGG_2015_19_2_a0/}
}