1. Benjamin, Rebekah George. 2012. Reconstructing readability: Recent developments and recommendations in the analysis of text difficulty. Educational Psychology Review, 24:63-88.
2. Wang, Lei. 2008. Some concepts of readability formula and relevant research paradigm as well as the research tasks of formula in TCFL. Language Teaching and Linguistic Studies, 6: 46-53.
3. Yu, Peng. 2009. Eye movement of Korean college students when reading Chinese texts of different styles. Journal of Tianjin University (Social Sciences), 11(4): 362-366.
4. Fu, Gan. 2012. Eyemovement study in reading of different difficulty of Chinese sentences. Psychological Research, 5(5): 39-45.
5. Ma, Yan-Hua. 2005.
. Applied Linguistics, S1: 45-47.