Gérard Chollet, Anna Esposito, Marcos Faúndez-Zanuy, Maria Marinaro: Nonlinear Speech Modeling and Applications, Advanced Lectures and Revised Selected Papers, 9th International Summer School "Neural Nets E.R. Caianiello" on Nonlinear Speech Processing: Algorithms and Analysis, Vietri sul Mare, Salerno, Italy, September 13-18, 2004. Lecture Notes in Computer Science 3445, Springer 2005, ISBN 3-540-27441-3