@article{JGG_2000_4_1_a0,
     author = {G. Glaeser and H.-P. Schr�cker},
     title = {Reflections on {Refractions}},
     journal = {Journal for geometry and graphics},
     pages = {001--018},
     year = {2000},
     volume = {4},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/JGG_2000_4_1_a0/}
}