@article{JGG_1998_2_2_a1,
     author = {E. Knoll},
     title = {Developing a {Procedure} to {Transfer} {Geometrical} {Constraints} from the {Plane} into {Space}},
     journal = {Journal for geometry and graphics},
     pages = {123--132},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1998},
     url = {http://geodesic.mathdoc.fr/item/JGG_1998_2_2_a1/}
}