Fotios Talantzis Aristodemos Pnevmatikakis Anthony G. Constantinides Audio-Visual Active Speaker Tracking in Cluttered Indoors Environments. 799-807 2008 38 IEEE Transactions on Systems, Man, and Cybernetics, Part B 3 http://dx.doi.org/10.1109/TSMCB.2008.922063 db/journals/tsmc/tsmcb38.html#TalantzisPC08