The PADL-1.0/2 system for defining and displaying solid objects. - Herbert B. Voelcker; Aristides A. G. Requicha; Eugene E. Hartquist; W. Fisher; J. Metzger; Robert B. Tilove; N. Birrell; W. Hunt; G. Armstrong; T. Check; R. Moote; J. McSweeney (SIGGRAPH, 1978)

A computing strategy for applications involving offsets, sweeps, and Minkowski operations. - Eugene E. Hartquist; Jai Menon 002; Krishnan Suresh; Herbert B. Voelcker; Jovan Zagajac (Comput. Aided Des., 1999)