Tanabe, M., T. Tamaki, A. Onishi, M. Sakamoto, and Y. Uchida. “The Class Practice for Advancing from CS Unplugged to Full-Fledged Programming”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 24, no. 5, Nov. 2015, pp. 43-50, https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/4747.