TY - Generic T1 - Anonymous Sequences from Trajectory Data T2 - 17th Italian Symposium on Advanced Database Systems Y1 - 2009 A1 - Ruggero G. Pensa A1 - Anna Monreale A1 - Fabio Pinelli A1 - Dino Pedreschi JF - 17th Italian Symposium on Advanced Database Systems CY - Camogli, Italy ER -