https://stat.ethz.ch/pipermail/r-help/2005-April/069923.html
http://psych.colorado.edu/wiki/lib/exe/fetch.php?media=labs:learnr:typeiortypeiiiss.pdf
http://cran.r-project.org/web/packages/fortunes/vignettes/fortunes.pdf
http://imaging.mrc-cbu.cam.ac.uk/statswiki/FAQ/sstypes
http://yihui.name/en/2010/04/rules-of-thumb-to-meet-r-gurus-in-the-help-list/
https://stat.ethz.ch/pipermail/r-help/2006-May/094765.html
https://stat.ethz.ch/pipermail/r-help/2006-August/111927.html
https://stat.ethz.ch/pipermail/r-help/2003-March/030705.html
https://stat.ethz.ch/pipermail/r-help/2008-February/153740.html
https://stat.ethz.ch/pipermail/r-devel/2000-May/020714.html
https://stat.ethz.ch/pipermail/r-help/2001-October/015984.html
http://www.stats.ox.ac.uk/pub/MASS3/Exegeses.pdf
http://mcfromnz.wordpress.com/2011/03/02/anova-type-iiiiii-ss-explained/
http://stats.stackexchange.com/questions/23197/type-iii-sum-of-squares-from-sas-and-r