1. 1. Cao X. Reduplicating Characters in the Book of Poetry; The Commercial Press: Shanghai, China, 1980.
2. 2. Zhu G. A Study on Disyllabic Words of the Book of Poetry; Henan People's Publishing House: Zhengzhou, China, 1985.
3. 3. Ye, S. The Cultural Interpretation of the Book of Songs - A Study of the Occurrence of Chinese Poetry; Shanxi People's Publishing House: Xi'an, China, 2005.
4. 4. Yang J. The State Adjectives in Pre-Qin Chinese. Stud. Chin. Lang. 1979, 6, 426-436.
5. 5. Sun J. Studies on the Reduplication Morphology of Ancient Chinese; Shanghai Educational Press: Shanghai, China, 2008.