@article{Ruppert1995,
author = {Ruppert, D. and Sheather, S. J. and Wand, M. P.},
title= {An effective bandwidth selector for local least squares regression},
year = {1995},
doi = {10.2307/2291516},
journal = {Journal of the American Statistical Association},
volume = {90},
pages = {1257--1270},
}