Stefano Rovetta Rodolfo Zunino VLSI circuits with fractal layout for spatial image decorrelation. 110-113 1999 conf/iscas/1999 ISCAS (4) http://doi.ieeecomputersociety.org/10.1109/ISCAS.1999.779954 db/conf/iscas/iscas1999-4.html#RovettaZ99