Issue No.03 - May (1982 vol.2)
D.A. Field , General Motors Research Laboratories
This test saves time in performing geometric operations involving quadric surfaces, the basic building blocks of most solid modeling systems.
D.A. Field, A.P. Morgan, "A Quick Method for Determining Whether a Second-Degree Polynomial Has Solutions In a Given Box", IEEE Computer Graphics and Applications, vol.2, no. 3, pp. 65-68, May 1982, doi:10.1109/MCG.1982.1674238