A note on robust density estimation for spatial point patterns. Diggle, P. J. Biometrika, 64:91–95, 1977.
bibtex   
@ARTICLE{Dig77,
  author = {Diggle, P. J.},
  title = {A note on robust density estimation for spatial point patterns},
  journal = {Biometrika},
  year = {1977},
  volume = {64},
  pages = {91--95},
  subdatabase = {distance}
}

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