3Ruppert, D. Selecting the number of knots for penalized spline, Journal of Computational and Graphical Statistics, To appear, (2002).
4Stone, Additive regression and other nonparameter model, Ann Statist. 13(1985), 685-705.
5Zeger, S L and Doggle P J. Semiparametric model for longitudinal data with application to CD4 cell numbers in HIV seroconverters, Biometric, 50(1994), 689-699.
6Zongwu Cai, Jianqing Fan and Qiwei Yao, Functional-coefficient regression models for nonlinear times series, JASA, 95(451)(2000), 941-956.
7Chin-Tsang Chiang, Rice J A and Wu C O. Smoothing spline estimation for varying coefficient models with repeatedly measure dependent variables, JASA, 96(454)(2001), 605-619.
8Colin O Wu, Chin-Tsang Chiang and Donald R.Hoover, Asymptotic confidence regions for kernel smoothing of a varying-coefficient model with longitudinal data, JASA, 93(444)(1998), 1388-1403.
9Fan, J and Zhang J T. Two-step estimation of functional linear models with applications to longitudinal data, J R Statist Soc B, 62(2000), 303-322.
10Green, P J. Reversible jump Markov chain Monte Carlo computation and Bayesian model determination, Biometrika, 82(1995), 711-732.
