1. Ahlgren, P. (2004). The effects of indexing strategy-query term combination on retrieval effectiveness in a Swedish full text database. Doctoral thesis. Göteborg University, Göteborg, Publications from Valfrid, 28.
2. From plain character strings to meaningful words: producing better full text databases for Finnish with morphological analysis software;Alkula;Information Retrieval,2001
3. Alkula, R. & Honkela, T. (1992). Tekstin tallennus-ja hakumentelmienkehittäminen suomen kielen tulkintaohjelmien avulla: FULLTEXT-projektin loppuraportti [Development of text storage and retrieval systems with morphological analysers for Finnish]. Espoo: VTT.
4. INQUERY does battle with TREC-6;Allan,1997
5. How effective is stemming and compounding for German text retrieval?;Braschler;Information Retrieval,2004