Joshua Z. Levin

Mathematical models for determining the intersections of quadric surfaces

Joshua Z. Levin, 1979 .

A parametric algorithm for drawing pictures of solid objects composed of quadric surfaces

Joshua Levin, Joshua Z. Levin, 1976, CACM.

QUADRIL: A computer language for the description of quadric-surface bodies

Joshua Z. Levin, Joshua Z. Levin, 1980, SIGGRAPH '80.