Designing learning objects that afford learners the experience of important variations in Chinese characters. - Ho-Cheong Lam; Wing-Wah Ki; Albert Ling-Sung Chung; Po-Yuk Ko; A. C. Y. Lai; S. M. S. Lai; P. W. Y. Chou; E. C. C. Lau (J. Comput. Assist. Learn., 2004)