@article{gui-sto-83-nen,
  author = {Leonidas J. Guibas and Jorge Stolfi},
  title = {On Computing all {North}-{East} Neighbors in the {$L_1$} Metric},
  journal = {Information Processing Letters},
  volume = {17},
  number = {4},
  pages = {219--223},
  year = 1983,
  month = nov
}