by Choi-Koh, Sang S., Ryoo, Byeong G.
Published in Educational psychology (Dorchester-on-Thames) (28.05.2019)

by Bo-myoung Ok, Changyeon Lee, Sang S. Choi-Koh
Published in Journal of Educational Research in Mathematics (31.05.2021)

by 홍인숙, 고상숙, Hong, In Sook, Choi-Koh, Sang Sook
Published in Suhak gyoyukak yeon-gu (Online) (2016)

by 한세호, 고상숙, Han, Se Ho, Choi-Koh, Sang Sook
Published in Suhak gyoyukak yeon-gu (Online) (31.05.2016)

by 고상숙(Sang Sook Choi-Koh)
Published in 韓國學校數學會論文集 (31.12.2023)

by 이현지, 고상숙, Lee, Hyun Ji, Choi-Koh, Sang Sook
Published in 韓國學校數學會論文集 (31.12.2022)

by 박우홍, 고상숙, Park, Woo Hong, Choi-Koh, Sang Sook
Published in 韓國學校數學會論文集 (30.06.2022)

by 고상숙
Published in 韓國學校數學會論文集 (31.03.2015)

by 고상숙
Published in 韓國學校數學會論文集 (31.03.2014)

by 이서빈, 김선호, 고상숙, Lee, Seo Bin, Kim, Sun Ho, Choi-Koh, Sang Sook
Published in 韓國學校數學會論文集 (30.09.2017)

by 정홍명, 고상숙
Published in 韓國學校數學會論文集 (31.12.2015)

by 고상숙, 이창연
Published in 韓國學校數學會論文集 (31.12.2014)

by 고희정, 고상숙
Published in 韓國學校數學會論文集 (31.03.2013)

by 고상숙, 박만구, 한혜숙
Published in 韓國學校數學會論文集 (31.12.2013)