by 황윤세(Yoon Se Hwang)
Published in Korean Journal of child studies (2008)

by 고정리(Jeong-Lee Ko)
Published in 한국콘텐츠학회 논문지, 14(5) (2014)

by 강정원(Jeong Won Kang), 김순자(Soon Ja Kim)
Published in Korean Journal of child studies (2006)