A. Arnal A. Lluch Juan Monterde Triangular Bézier Surfaces of Minimal Area. 366-375 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2669&spage=366 2003 conf/iccsa/2003-3 ICCSA (3) db/conf/iccsa/iccsa2003-3.html#ArnalLM03