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Citation: J. Argyris et al., Determination of envelope to family of planar parametric curves and envelope singularities, COMPUT METH, 175(1-2), 1999, pp. 175-187

Authors: Litvin, FL De Donno, M Lian, QM Lagutin, SA

Citation: Fl. Litvin et al., Alternative approach for determination of singularity of envelope to a family of parametric surfaces, COMPUT METH, 167(1-2), 1998, pp. 153-165