1. Method and mean for recognizing complex patterns;Hough,1962
2. Using the Hough transform to detect lines and curves in pictures;Duda;Communs Ass. comput. Mach.,1972
3. Finding circles by an array of accumulators;Kimme;Communs. Ass. comput. Mach.,1975
4. Computing the spatial structure of cellular textures;Davis;Comput. Graphics Image Process.,1979
5. A parallel mechanism for detecting curves in pictures;Merlin;IEEE Trans. Comput.,1975