@article{statisticallyandcomputationallyefficient,
  title = {Statistically and Computationally Efficient Variance Estimator for Kernel Ridge Regression},
  author = {Meimei Liu and Jean Honorio and Guang Cheng},
  year = {2018},
  eprint = {1809.06019},
  archivePrefix = {arXiv},
  url = {http://arxiv.org/abs/1809.06019v1},
}