1. Baek, W. Y., Song, C. Y., Son, H. J., Lee, E. H., Lee, J., Kim, H. J. & Yoon, J. H. (2021).Ph. D. Survey 2021- Survey on the Status of New PhD Recipients. Korean Research Institute for Vocational Education & Training (in Korean).
2. Choi, C. K. (2015).Materials for the Report and Discussion of the Research Environment of Graduate Students.National Human Rights Commission of Korea (in Korean). https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=web&cd=&ved=0CAIQw7AJahcKEwiglPzmtpWAAxUAAAAAHQAAAAAQAw&url=https%3A%2F%2Fwww.humanrights.go.kr%2Fdownload%2FBASIC_ATTACH%3FstorageNo%3D1056129&psig=AOvVaw2A-y7cy4m1xFqiAO-bplY1&ust=1689672525186389&opi=89978449