개인적으로 좀 관심을 갖고 있어서 몇몇 글들을 스크랩함.
http://ppss.kr/archives/18339
http://www.amazon.omwww.workingus.com/v2/gnu/bbs/board.php?bo_table=job&wr_id=13202&page=511
http://jung9nee.blogspot.jp/2013/11/blog-post.html
http://liveandventure.com/2012/12/21/rank/