Richard J. Ricci: Spacebar: kinematic design by computer graphics.
727-735
Volume 25, Number 12, December 1993
Michael Leesley: PC CAD is closing in on mainframeCAD.
739-740
S. Alasdair Buchanan, Alan de Pennington: Constraint definition system: a computer-algebra based approach to solving geometric-constraint problems.
741-750