Links for skidmarks
skidmarks-0.0.2.tar.gz
skidmarks-0.0.1.tar.gz
skidmarks-0.0.3.tar.gz
0.0.3 home_page
0.0.2 home_page
0.0.1 home_page
http://books.google.com/books?id=EIbxfCGfzgcC&lpg=PA141&ots=o-8ymmqbs9&pg=PA142#v=onepage&q=&f=false
http://en.wikipedia.org/wiki/Wald-Wolfowitz_runs_test
http://support.sas.com/kb/33/092.html