1. Amjadi R, Martinez W (2021) The 2016 data challenge of the American Statistical Association. Computational Statistics
2. Analysis Division, Federal Motor Carrier Safety Administration, United States Department of Transportation (2014) Large Truck and Bus Crash Facts 2014. Technical report. https://www.fmcsa.dot.gov/safety/data-and-statistics/large-truck-and-bus-crash-facts-2014. accessed 2016-09-01
3. Dimitriadou E (2015) cclust: Convex Clustering Methods and Clustering Indexes. R package version 0.6-20. https://cran.r-project.org/web/packages/cclust/index.html. Accessed 2016-09-01
4. Friedman J, Hastie T, Tibshirani R (2001) The elements of statistical learning. Springer series in statistics. Springer, New York
5. Kohonen T (1982) Self-organized formation of topologically correct feature maps. Biol Cybern 43(1):59–69