1. Benedetti, J.K. (1977), On the nonparametric estimation of regression functions. Journal of the Royal Statistical Society, B-39, 248–253.
2. Eicker, F. (1967), Limit theorems for regression with unequal and dependent errors, pp. 59–82 in Proceedings of the Fifth Berkeley Symposium on Mathematical Statistics and Probability, Volume1. Berkeley: University of California Press.
3. Hardie, W. and Gasser, T. (1984), Robust nonparametric function fitting. Journal of the Royal Statistical Society, B-46, 42–51.
4. Ibragimov, I.A. and Linnik, Y.V. (1971), Independent and Stationary Sequences of Random Variables. Groningen: Walters-Noordhoff.
5. Malinvaud, E. (1970), The consistency of nonlinear regressions. Annals of Mathematical Statistics, 41, 956–969.