Bao, Ran, and Jianyong Chen. “Characteristics and Problems of Unplugged Computer Science Curriculum for Young Children: Comparative and Practical Research Based on the Curriculum in Four Countries”. International Journal for Innovation Education and Research, vol. 10, no. 4, Apr. 2022, pp. 1-22, https://doi.org/10.31686/ijier.vol10.iss4.3700.