Li Xu Lianku Wu Qinghe Wu Zhiping Lin Yegui Xiao Reduced-order realization of Fornasini-Marchesini model for 2D systems. 289-292 2004 ISCAS (3) http://dx.doi.org/10.1109/ISCAS.2004.1328740 db/conf/iscas/iscas2004-3.html#XuWWLX04