@article{JMLR:v16:gyorfi15a,
  author  = {L{{\'a}}szl{{\'o}} Gy{{\"o}}rfi and Harro Walk},
  title   = {On the Asymptotic Normality of an Estimate of a Regression Functional},
  journal = {Journal of Machine Learning Research},
  year    = {2015},
  volume  = {16},
  number  = {55},
  pages   = {1863--1877},
  url     = {http://jmlr.org/papers/v16/gyorfi15a.html}
}