@article{JGG_2008_12_1_JGG_2008_12_1_a3,
     author = {B. Odehnal },
     title = {Subdivision {Algorithms} for {Ruled} {Surfaces}},
     journal = {Journal for geometry and graphics},
     pages = {35--52},
     year = {2008},
     volume = {12},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/JGG_2008_12_1_JGG_2008_12_1_a3/}
}