Issue No.04 - April (1985 vol.5)
Ingrid Carlbom , Schlumberger-Doll Research
David Vanderschel , Schlumberger-AEC
The polytree, a generalization of the octree data structure, retains most of the desirable features of the octree structure while offering several advantages.
Ingrid Carlbom, David Vanderschel, "A Hierarchical Data Structure for Representing the Spatial Decomposition of 3-D Objects", IEEE Computer Graphics and Applications, vol.5, no. 4, pp. 24-31, April 1985, doi:10.1109/MCG.1985.276454