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Submitted on: 30 April 2022.
Revised on: 10 May 2022.
Accepted on: 29 May 2022.
Qualitative Theory of Dynamical Systems
Submitted on: 02 December 2006.
Revised on: 31 December 2006.
Accepted on: 14 January 2007.
Qualitative Theory of Dynamical Systems
Submitted on: 23 October 2005.
Revised on: 02 December 2005.
Accepted on: 22 December 2005.
Qualitative Theory of Dynamical Systems
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Submitted on: 21 October 2001.
Revised on: 29 November 2001.
Accepted on: 16 December 2001.
Qualitative Theory of Dynamical Systems
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Submitted on: 31 July 1999.
Revised on: 11 August 1999.
Accepted on: 16 August 1999.
Qualitative Theory of Dynamical Systems
Submitted on: 25 September 1998.
Revised on: 26 October 1998.
Accepted on: 17 November 1998.
Qualitative Theory of Dynamical Systems