Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) LIANG J,JDCAD : A Highly Interactive 3D Modeling System,"3rd International Conference on CAD and Computer Graphics, Beijing, China, Aug. 1993",,,1993,,,217-222,https://cir.nii.ac.jp/crid/1574231874760324992,