Please contact the NLP group leader Dr. Michael Strube to use this software for commercial purposes:

Dr. Michael Strube 
EML Research gGmbH
Schloss-Wolfsbrunnenweg 33
D-69118 Heidelberg, Germany

Publications related to Wikipedia-Similarity:

• AAAI'06 (PDF)
  Strube, Michael; Ponzetto, Simone Paolo (2006). WikiRelate! Computing Semantic Relatedness Using Wikipedia. In: Proceedings of the 21st National Conference on Artificial Intelligence, Boston, Mass., 16-20 July, 2006, pp.1219-1224.
  
  
• HLT-NAACL'06 (PDF)
  Ponzetto, Simone Paolo; Strube, Michael (2006). Exploiting Semantic Role Labeling, WordNet and Wikipedia for Coreference Resolution. In: Proceedings of the Human Language Technolgy Conference of the North American Chapter of the Association for Computational Linguistics, New York City, N.Y., 4-9 June, 2006, pp.192-199.