A Kernel Two-Sample Test, Arthur Gretton, Karsten M. Borgwardt, Malte J. Rasch, Bernhard Schölkopf, and Alex Smola, 2012Journal of Machine Learning Research, Vol. 13 (JMLR.org)DOI: 10.5555/2246738.2246797 - Presents the Maximum Mean Discrepancy (MMD) as a non-parametric test for comparing two distributions, a core component of KID.