Chang, L., Xu, Y., Perfetti, C., Zhang, J., & Chen, H. (2014) Supporting Orthographic Learning at the Beginning Stage of Learning to Read Chinese as a Second Language, International Journal of Disability, Development, and Education, 61:3, 288-305.
Chen, H. C., Hsu, C. C., Chang, L. Y., Lin, Y. C., Chang, K. E., & Sung, Y. T. (2013). Using a Radical-Derived Character E-Learning Platform to Increase Knowledge of Chinese Characters. Retrieved from https://scholarspace.manoa.hawaii.edu/bitstream/10125/24511/1/Chen%20HC.pdf