@article{JGG_2001_5_2_a4,
     author = {R. A. Wiggs},
     title = {Geometry as {Transformation}},
     journal = {Journal for geometry and graphics},
     pages = {157--164},
     publisher = {mathdoc},
     volume = {5},
     number = {2},
     year = {2001},
     url = {http://geodesic.mathdoc.fr/item/JGG_2001_5_2_a4/}
}