https://www.syu.ac.kr/grad/2020%eb%85%84-riss-%ec%98%a8%eb%9d%bc%ec%9d%b8-%ec%9d%b4%ec%9a%a9%ea%b5%90%ec%9c%a1-%ed%99%8d%eb%b3%b4-%eb%b0%8f-%ec%b0%b8%ea%b0%80-%ec%8b%a0%ec%b2%ad-%ec%95%88%eb%82%b4-2/2020%eb%85%84-riss-%ec%98%a8%eb%9d%bc%ec%9d%b8-%ec%9d%b4%ec%9a%a9%ea%b5%90%ec%9c%a1-%ed%99%8d%eb%b3%b4-%ed%8f%ac%ec%8a%a4%ed%84%b0-2/