@article{Gramacki:2017,
  author  = "A. Gramacki and J. Gramacki",
  title   = "FFT-Based Fast Bandwidth Selector for Multivariate Kernel Density Estimation",
  journal = "Computational Statistics and Data Analysis",
  volume  = "Vol. 106",
  pages   = "27--45",
  year    = "2017",
}