- http://tedlab.mit.edu/~dr/Tgrep2/tgrep2.pdf
TGrep2 User Manual - http://www.grsampson.net/RSue.html
Further Information about the need for treebanks and the differences between the SUSANNE Corpus and the Penn Treebank - http://www.grsampson.net/SueDoc.html
The SUSANNE Corpus Documentation - http://www.cis.upenn.edu/~treebank/home.html
Homepage of the Penn Treebank - http://www.regenechsen.de/phpwcms/index.php?regex_allg_einf
A German tutorial on regular expressions - http://www.regular-expressions.info/tutorial.html
Another tutorial on regular expressions