Sebastiano Battiato Domenico Cantone Dario Catalano Gianluca Cincotti Micha Hofri An Efficient Algorithm for the Approximate Median Selection Problem. 226-238 2000 conf/ciac/2000 CIAC http://dx.doi.org/10.1007/3-540-46521-9_19 db/conf/ciac/ciac2000.html#BattiatoCCCH00