Moon, Hyunchang, Jongpil Cheon, and Kyungbin Kwon. “Difficult Concepts and Practices of Computational Thinking Using Block-Based Programming”. International Journal of Computer Science Education in Schools 5, no. 3 (May 2, 2022): 3–16. Accessed July 15, 2024. https://ijcses.org/index.php/ijcses/article/view/129.