Interactive Okapi at Sheffield - TREC-8. - Micheline Hancock-Beaulieu; Helene Fowkes; Nega Alemayehu; Mark Sanderson (TREC, 1999)

Stemming of Amharic Words for Information Retrieval. - Nega Alemayehu; Peter Willett 002 (Lit. Linguistic Comput., 2002)

Analysis of performance variation using query expansion. - Nega Alemayehu (J. Assoc. Inf. Sci. Technol., 2003)

The effectiveness of stemming for information retrieval in Amharic. - Nega Alemayehu; Peter Willett 002 (Program, 2003)