1. , (2013).,: . :, 10(3), 449-470.
2. , (2011). :. , 12(5), 1545-1560.
3. (2021). 2021 1. https://www.moe.go.kr/boardCnts/viewRenew.do?boardID=294&lev=0&statusYN=W&s=moe&m=020402&opType=N&boardSeq=88940 .
4. , , (2016).. :.
5. , (2015).:. , 23(1), 139-156.