Stephen Warrington Subramania Sudharsanan Wai-Yip Chan Architecture for Multiple Reference Frame Variable Block Size Motion Estimation. 2894-2897 2007 conf/iscas/2007 ISCAS http://doi.ieeecomputersociety.org/10.1109/ISCAS.2007.377854 db/conf/iscas/iscas2007.html#WarringtonSC07