A. Arnal A. Lluch Juan Monterde A Property on Singularities of NURBS Curves. 229-238 2002 conf/iccS/2002-2 International Conference on Computational Science (2) http://link.springer.de/link/service/series/0558/bibs/2330/23300229.htm db/conf/iccS/iccS2002-2.html#ArnalLM02