@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 = {10.1080/01621459.1995.10476630},
volume = {90},
number = {432},
pages = {257--1270},
}