Periodic Orbits in Chaotic Attractors:

Characterization of unstable periodic orbits in chaotic attractors and repellers.
O. Biham and W. Wenzel,
Phys. Rev. Lett. 63, 819 (1989).
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Unstable periodic orbits and the symbolic dynamics of the complex Henon map.
O. Biham and W. Wenzel,
Phys. Rev. A42, 4639 (1990).
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Periodic orbits in the dissipative standard map.
W. Wenzel, O. Biham and C. Jayaprakash,
Phys. Rev. A43 , 6550 (1991).
Journal  

Unstable periodic orbits in the stadium billiard.
O. Biham and M. Kvale,
Phys. Rev. A46 , 6334 (1992).
Journal     Archive 

Complete mode locking in models of charge density waves.
A.A. Middleton, O. Biham, P.B. Littlewood and P. Sibani,
Phys. Rev. Lett. 68 ,1586 (1992).
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Systematic computation of the least unstable periodic orbits in chaotic attractors.
F.K. Diakonos, P. Schmelcher and O. Biham,
Phys. Rev. Lett. 81, 4349 (1998).
Journal      Archive

Theory and Applications of the Systematic Detection of Unstable Periodic Orbits in Dynamical Systems.
D. Pingel, P. Schmelcher, F.K. Diakonos and O. Biham,
Phys. Rev. E62, 2119 (2000).
Journal      Archive