Links
[1] http://www.si.re.kr/%23
[2] http://facebook.com/sharer.php?u=http%3A%2F%2Fwww.si.re.kr%2Fnode%2F40801&t=%5B%EB%85%BC%EB%AC%B8%5D%20%EC%97%AD%EC%84%B8%EA%B6%8C%20%EB%B3%B4%ED%96%89%EC%9E%90%20%EB%A7%8C%EC%A1%B1%EC%A7%80%EC%88%98%28PSI%29%20%EA%B0%9C%EB%B0%9C%EC%97%90%20%EA%B4%80%ED%95%9C%20%EC%97%B0%EA%B5%AC
[3] http://twitter.com/intent/tweet?url=http%3A%2F%2Fwww.si.re.kr%2Fnode%2F40801&text=%5B%EB%85%BC%EB%AC%B8%5D%20%EC%97%AD%EC%84%B8%EA%B6%8C%20%EB%B3%B4%ED%96%89%EC%9E%90%20%EB%A7%8C%EC%A1%B1%EC%A7%80%EC%88%98%28PSI%29%20%EA%B0%9C%EB%B0%9C%EC%97%90%20%EA%B4%80%ED%95%9C%20%EC%97%B0%EA%B5%AC
[4] http://www.si.re.kr/taxonomy/term/15694
[5] http://www.si.re.kr/si_download/40801/6765
[6] http://www.si.re.kr/taxonomy/term/17311
[7] http://www.si.re.kr/taxonomy/term/17444
[8] http://www.si.re.kr/studies_on/15694