1. Xue Yuanxin: submitted to Education for Chinese After-school (Theory) (2009).
2. Xue Jianrong & Leng tao: submitted to Journal of Yellow River Conservancy Technical Institute, (2008).
3. Li Meihua & Ding Xiuying: submitted to Journal of Yellow River Conservancy Technical Institute (2007).
4. Wu Rong: submitted to Journal of Guangxi Radio and TV University (2002).
5. Hao Hongke: submitted to Journl of Yangling Vocational and Technical College (2005).