Tomohiro Nishida Susumu Kanemune Yukio Idosaka Mitaro Namiki Tim Bell Yasushi Kuno A CS unplugged design pattern. 231-235 2009 SIGCSE http://doi.acm.org/10.1145/1508865.1508951 conf/sigcse/2009 db/conf/sigcse/sigcse2009.html#NishidaKINBK09