Kyle Spafford Jeremy S. Meredith Jeffrey S. Vetter Quartile and Outlier Detection on Heterogeneous Clusters Using Distributed Radix Sort. 412-419 2011 CLUSTER http://doi.ieeecomputersociety.org/10.1109/CLUSTER.2011.53 conf/cluster/2011 db/conf/cluster/cluster2011.html#SpaffordMV11