Topic hierarchy generation via linear discriminant projection Tao Li, Shenghuo Zhu, and Mitsunori Ogihara Return to Posters BIBTEX @inproceedings       {DBLP:conf/sigir/LiZO03,   author    = {Tao Li and                 Shenghuo Zhu and                 Mitsunori Ogihara},    booktitle = {SIGIR},    title     = {Topic hierarchy generation via linear discriminant projection.},    pages     = {421-422},    year      = {2003},    url       = {db/conf/sigir/sigir2003.html#LiZO03},    ee        = {http://doi.acm.org/10.1145/860531},    crossref  = {conf/sigir/2003},    bibsource = {DBLP, http://dblp.uni-trier.de}  } ©2004 Association for Computing Machinery