Arthur Gretton Ralf Herbrich Alexander J. Smola Olivier Bousquet Bernhard Schölkopf Kernel Methods for Measuring Independence. 2075-2129 2005 6 Journal of Machine Learning Research http://www.jmlr.org/papers/v6/gretton05a.html db/journals/jmlr/jmlr6.html#GrettonHSBS05