Panagis Magdalinos Christos Doulkeridis Michalis Vazirgiannis FEDRA: A Fast and Efficient Dimensionality Reduction Algorithm. 509-520 2009 SDM http://www.siam.org/proceedings/datamining/2009/dm09_048_magdalinosp.pdf conf/sdm/2009 db/conf/sdm/sdm2009.html#MagdalinosDV09