1. “Digital Picture Processing.”;Rosenfeld,1976
2. “Pattern Classification and Scene Analysis.”;Duda,1973
3. Connectivity in digital pictures;Rosenfeld;J. Assoc. Comput. Mach.,1970
4. Adjacency in digital pictures;Rosenfeld;Information and Control,1974
5. Arcs and curves in digital pictures;Rosenfeld;J. Assoc. Comput. Mach.,1973