Olivier Bousquet Vladimir Koltchinskii Dmitriy Panchenko Some Local Measures of Complexity of Convex Hulls and Generalization Bounds. 59-73 2002 conf/colt/2002 COLT http://link.springer.de/link/service/series/0558/bibs/2375/23750059.htm db/conf/colt/colt2002.html#BousquetKP02