1. Computer processing of line drawing images;Freeman;ACM Computing Surveys,1974
2. Canonical shape description for 3-d stick bodies;Guzmán;MCC Technical Report Number: ACA-254-87,1987
3. Uses of technology to enhance education;Papert,1973
4. Pattern Classification and Scene Analysis;Duda,1973
5. Picture Processing by Computer;Rosenfeld,1968