https://skyjournals.org/%ec%8a%a4%ed%85%8c%ec%9d%b4%ed%82%b9-%eb%b0%a9%ec%8b%9d-%ec%b9%b4%ec%a7%80%eb%85%b8-%ea%b2%8c%ec%9e%84%ec%97%90%ec%84%9c%ec%9d%98-%ec%a0%84%eb%9e%b5%ec%a0%81%ec%9d%b8-%eb%b2%a0%ed%8c%85-%eb%b0%a9/