Petti, Lucia, <!-- p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 10.0px Helvetica} span.s1 {font: 7.0px Helvetica} --> <p class="p1">CNR, Institute of Applied Sciences and Intelligent Systems, 80072 Pozzuoli, Italy</p>