https://www.syu.ac.kr/blog/%ec%82%ac%ed%9a%8c%eb%b4%89%ec%82%ac%eb%8b%a8-2021%ed%95%99%eb%85%84%eb%8f%84-%ed%95%98%ea%b3%84-%ea%b5%ad%eb%82%b4%eb%b4%89%ec%82%ac%eb%8c%80-%eb%aa%a8%ec%a7%91-%ea%b3%b5%ea%b3%a0/2021-1-%ea%b5%ad%eb%82%b4%eb%b4%89%ec%82%ac%eb%8c%80-%ea%b0%9c%ec%9d%b8%ec%b0%b8%ea%b0%80%ec%8b%a0%ec%b2%ad%ec%84%9c-%eb%b0%8f-%eb%b6%80%eb%aa%a8%eb%8b%98%eb%8f%99%ec%9d%98%ec%84%9c/