1. IBM Patterns for e-business (December 2006), http://www.128.ibm.com/developerworks/patterns/
2. W3C XSL Transformations (XSLT) (1999), http://www.w3.org/TR/xslt
3. ACME, Carnegie Mellon University, and Dave Wile at USC’s Information Sciences Institute, USA (2006), http://www.cs.cmu.edu/~acme/
4. British National Corpus, Oxford University Computing Services, UK (2006), http://www.natcorp.ox.ac.uk/
5. SketchEngine, Lexical Computing Ltd (2006), www.sketchengine.co.uk