W1 Frakes & Fox. 2003. Strength and Similarity of Affix Removal Stemming Algorithms
W2 M. D. McIlroy. 1982. Development of a Spelling List. AT&T Bell Laboratories
W2a Unix Spell
W3 Unix Spell
W4 Levenshtein distance
W5 Lovins Stemmer
W6 Hull David A. Stemming Algorithms_-A Case Study for Detailed Evaluation. Rank-Xerox Research Centre. 1995
W7 Yamout F. Further Enhancement to the Porter's Stemming Algorithm. C E American Univ. Lebanon. 2004.
W8 Chris Paice. 'Method for Evaluation of Stemming Algorithms Based on Error Counting' 

Sanchez, R. M (2005) A Generalization of the Method for Evaluation of Stemming Algorithms Based on Error Counting, Proceedings of SPIRE 2005

Term conflation methods in information retrieval - Non-linguistic and linguistic approaches

Carmen Galvez, Felix de Moya-Anegon and Vıctor H. Solana

Department of Information Science, University of Granada, Granada, Spain

Grady Ward's Moby Project Word Lists at Sheffield University

Word Lists at Lancashire University