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Amir Ben-Dor, Laurakay Bruhn, Nir Friedman, Iftach Nachman, Michèl Schummer, Zohar Yakhini. Tissue Classification with Gene Expression Profiles. _Journal of Computational Biology_ **7**, 559–583 (2000).  Alvis Brazma, Jaak Vilo. Gene expression data analysis. _FEBS Letters_ **480**, 17–24 (2000). Eric P. Xing, Michael I. Jordan, and Richard M. Karp. Feature selection for high-dimensional genomic microarray data. _In Proceedings of the Eighteenth International Conference on Machine Learning_, pages 601–608.  Morgan Kaufmann, 2001.