https://www.ibs.re.kr/cop/bbs/BBSMSTR_000000000971/selectBoardArticle.do?nttId=18178
http://scienceon.hani.co.kr/?document_srl=283903
http://nifds.go.kr/brd/m_480/view.do?seq=13509&srchFr=&srchTo=&srchWord=&srchTp=&itm_seq_1=0&itm_seq_2=0&multi_itm_seq=0&company_cd=&company_nm=&page=1
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