Estimation on semivarying coefficient models with different degrees of smoothness. - Riquan Zhang; Jingyan Feng; Kaichun Wen; Jianhua Ding (J. Syst. Sci. Complex., 2009)

Inference on coefficient function for varying-coefficient partially linear model. - Jingyan Feng; Riquan Zhang (J. Syst. Sci. Complex., 2012)

Partially linear single-index beta regression model and score test. - Weihua Zhao; Riquan Zhang; Zhensheng Huang; Jingyan Feng (J. Multivar. Anal., 2012)