@article{JGG_1998_2_2_a0,
     author = {J. Lang and H.-P. Schroecker},
     title = {Edge-Orthogonal {Patches} through a {Given} {Rational} {Bezier} {Curve}},
     journal = {Journal for geometry and graphics},
     pages = {109--122},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1998},
     url = {http://geodesic.mathdoc.fr/item/JGG_1998_2_2_a0/}
}