To cite package ‘nabor’ in publications use:

  Elseberg J, Magnenat S, Siegwart R, Nüchter A (2012). “Comparison of
  nearest-neighbor-search strategies and implementations for efficient
  shape registration.” _Journal of Software Engineering for Robotics
  (JOSER)_, *3*(1), 2-12. ISSN 2035-3928.

A BibTeX entry for LaTeX users is

  @Article{elsebergcomparison,
    title = {Comparison of nearest-neighbor-search strategies and implementations for efficient shape registration},
    author = {J. Elseberg and S. Magnenat and R. Siegwart and A. N{\"u}chter},
    journal = {Journal of Software Engineering for Robotics (JOSER)},
    pages = {2--12},
    volume = {3},
    number = {1},
    year = {2012},
    issn = {2035-3928},
  }