@inbook{Gasser1979,
author = {Gasser, T. and Müller, H.},
title= {Kernel estimation of regression functions},
year = {1979},
doi = {10.1007/BFb0098489},
booktitle = {Smoothing Techniques for Curve Estimation. Lecture Notes in Mathematics 757},
address = {New York},
publisher = {Springer-Verlag},
pages = {23--68},
}