“…WMs have proved to be useful for applications in several fields, such as in chemical processes (Kalafatis et al, 1995;Pajunen, 1992;Pearson and Pottmann, 2000;Zhu, 1999), biological processes (Korenberg, 1973;Hunter and Korenberg, 1986), communications (Kang et al, 1998;Kang et al, 1999;Cheong et al, 2005) and control (Norquay et al, 1998;Gerkšič et al, 2000;Lussón Cervantes et al, 2003;Biagiola et al, 2004).…”