1. BREIMAN, L., FRIEDMAN, J. H., OLSHEN, R. A. and STONE, C. J. (1984): Classification and Regression Trees. Wadsworth, Belmont.
2. CHIANG, C., RICE, J. A. and WU, C. O. (2001): Smoothing Spline Estimation for Varying Coefficient Models With Repeatedly Measured Dependent Variables. Journal of the American Statistical Association, 96, 605–619.
3. CIAMPI, A., LOU, Z., LIN, Q. and NEGASSA, A. (1991): Recursive Partitioning and Amalgamation with the Exponential Family. Theory and Application. Applied Stochastic Models and Data Analysis, 7, 121–137.
4. DIGGLE, P. J., LIANG, K. Y. and ZEGER, S. L. (1994): The Analysis of Longitudinal Data. Oxford University Press, Oxford.
5. FRIEDMAN, J. H. (1996): Local Learning based on Recursive Covering. Technical Report, Department of Statistics, Stanford University.