Issue No.02 - March (1982 vol.2)
R. Hillyard , Computervision Corporation
Build 2, Design, and Romulus are solid modelers with evolutionary links. Consideration of their characteristics and histories yields some general insights into solid modeling.
R. Hillyard, "The Build Group of Solid Modelers", IEEE Computer Graphics and Applications, vol.2, no. 2, pp. 43-52, March 1982, doi:10.1109/MCG.1982.1674161