http://stat.epfl.ch/webdav/site/stat/shared/Regression/EPFL-Sweave-powerdot.pdf
http://www.stat.uni-muenchen.de/~leisch/Sweave/Sweave-manual.pdf
http://biostat.mc.vanderbilt.edu/wiki/pub/Main/TheresaScott/ReproducibleResearch.TAScott.handout.pdf
http://www.stat.uni-muenchen.de/~leisch/Sweave/Sweave-manual.pdf
http://biostat.mc.vanderbilt.edu/wiki/pub/Main/TheresaScott/ReproducibleResearch.TAScott.handout.pdf