1. Data Structures and PL/I Programming;Augenstein,1979
2. An efficient way to represent quadtrees;Gargantini;Communications of the Association for Computing Machinery,1982
3. Linear octrees for fast processing of three-dimensional objects;Gargantini;Computer Graphics and Image Processing,1982
4. Operations on images using quadtrees;Hunter;IEEE Transactions on Pattern Analysis and Machine Intelligence,1979
5. Linear transformations of pictures represented by quadtrees;Hunter;Computer Graphics and Image Processing,1979