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    Solid Modeling with Parametric Surfaces
    (The Eurographics Association, 1983) Alander, J.; Mantyla, M.; RANTANEN, T.; P.J.W. ten Hagen
    Solid modeling systems are now entering industrial usage. To guarantee their wide applicability, the capabilities of solid modelers should be enhanced to allow inclusion of free-form surfaces in their geometric models, however. Based on our evolving work, we describe the methodology and some key components of a solid modeler with parametric surface processing capability. Emphasis is put on a clean and extendible design that avoids the arbitrary restrictions which often are present in current systems.