A. Tamburini, L. Gentile, A. Cipollina, G. Micale, and A. Brucato, “EXPERIMENTAL INVESTIGATION OF DILUTE SOLID-LIQUID SUSPENSION IN AN UNBAFFLED STIRRED VESSELS BY A NOVEL PULSED LASER BASED IMAGE ANALYSIS TECHNIQUE”, Chemical Engineering Transactions, vol. 17, pp. 531-536, May 2009.