Lars Backstrom Rich Caruana C2FS: An Algorithm for Feature Selection in Cascade Neural Networks. 4748-4753 2006 IJCNN http://ieeexplore.ieee.org/xpls/abs_all.jsp?isnumber=36115&arnumber=1716759&count=787&index=697 conf/ijcnn/2006 db/conf/ijcnn/ijcnn2006.html#BackstromC06