Nikhil Joshi Debasish Dutta Feature Simplification Techniques for Freeform Surface Models. 177-186 2003 3 J. Comput. Inf. Sci. Eng. 3 http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JCISB6000003000003000177000001&idtype=cvips&gifs=Yes db/journals/jcise/jcise3.html#JoshiD03