Takayuki Tsuchida Teppei Shimada Tatsuo Tsuji Ken Higuchi Information Storage and Retrieval Schemes for Recycling Products. 37-45 2008 3 JSW 6 http://www.academypublisher.com/jsw/vol03/no06/jsw03063745.html db/journals/jsw/jsw3.html#TsuchidaSTH08