https://www.syu.ac.kr/sw/2017%eb%85%84-%ec%a0%9c-16%ea%b8%b0-%eb%8f%99%ea%b3%84-%eb%8c%80%ed%95%99%ec%83%9d-%ec%9e%ac%eb%8a%a5%eb%b4%89%ec%82%ac-%ea%b5%ad%ea%b0%80%ec%9a%b0%ec%88%98%ec%9e%a5%ed%95%99%ec%83%9d-%ec%ba%a0/