... Dynamical systems, Nagoya, 1990, . ... Dynamical systems, Moscow, 1994, Member of the Organizing Committee for the conference. International Congress in Dynamical systems, Montevideo, 1995, . ... Workshop on Dynamical Systems, Warsow, October 1995, . ... Penn State Dynamical Systems workshop, October 99. ... Global Invariant Manifolds in Dynamical Systems, Workshop, December 10-16, 2000, Oberwolfach, Germany. 2 talks at Petrovskii Centennial Conference, May 22-27, 2001, Moscow, Russia. ...