TY - JOUR A1 - Sauer, T. A1 - Grebogi, Celso A1 - Yorke, J. A. T1 - How long do numerical chaotic solutions remain valid? Y1 - 1997 ER - TY - JOUR A1 - Poon, L. A1 - Grebogi, Celso A1 - Feudel, Ulrike A1 - Yorke, J. A. T1 - Dynamical properties of a simple mechanical system with a large number of coexisting periodic attractors Y1 - 1998 ER -