Rastislav Lukac Bogdan Smolka Konstantinos N. Plataniotis Anastasios N. Venetsanopoulos Generalized adaptive vector sigma filters. 537-540 2003 ICME http://doi.ieeecomputersociety.org/10.1109/ICME.2003.1220973 conf/icmcs/2003 db/conf/icmcs/icme2003.html#LukacSPV03