@misc{indiciae53623713d11a,
  title = {A nonparametric estimate of a multivariate density function},
  author = {Loftsgaarden, D. O. and Quesenberry, C. P.},
  year = {1964},
  url = {https://ntrs.nasa.gov/citations/19650022552},
  note = {Source identifier: 19650022552}
}