C. Zahn. SIGCSE '87: Proceedings of the eighteenth SIGCSE technical symposium on Computer science education, page 264--266. New York, NY, USA, ACM, (1987)
C. Zahn. SIGCSE '87: Proceedings of the eighteenth SIGCSE technical symposium on Computer science education, page 264--266. New York, NY, USA, ACM, (1987)