2008 Hahsler, Michael, Hornik, Kurt, Buchta, Christian. 2008. Getting things in order: An introduction to the R package seriation. Journal of Statistical Software 25 (3): 1-34. http://www.jstatsoft.org/v25/i03. (Details)
2007 Hahsler, Michael, Hornik, Kurt. 2007. TSP - Infrastructure for the traveling salesperson problem. Journal of Statistical Software 23 (2): 1-21. http://www.jstatsoft.org/v23/i02. (Details)