Deyi Xue Hideaki Takeda Takashi Kiriyama Tetsuo Tomiyama Hiroyuki Yoshikawa An Intelligent Integrated Interactive CAD-A Preliminary Report. 163-192 1991 conf/ifip5-2/1991 IntCAD db/conf/ifip5-2/ifip5-2-1991.html#XueTKTY91