To cite in publications use:

Michael Hahsler and Kurt Hornik (2011). Traveling Salesperson Problem (TSP) R package version 1.0-7.

Michael Hahsler, and Kurt Hornik (2007), TSP - Infrastructure for the traveling salesperson problem. Journal of Statistical Software 23/2. URL: http://www.jstatsoft.org/v23/i02/.

Corresponding BibTeX entries:

  @Manual{,
    title = {Traveling Salesperson Problem (TSP)},
    author = {Michael Hahsler and Kurt Hornik},
    year = {2011},
    note = {R package version 1.0-7.},
    url = {http://CRAN.R-project.org/},
  }

  @Article{,
    title = {TSP - Infrastructure for the traveling salesperson
      problem},
    author = {Michael Hahsler and Kurt Hornik},
    year = {2007},
    journal = {Journal of Statistical Software},
    volume = {23},
    number = {2},
    pages = {1--21},
    url = {http://www.jstatsoft.org/v23/i02/},
    month = {December},
    issn = {1548-7660},
  }