References

Davidchack, R. L. and Lai, Y.-C. (1999). Efficient algorithm for detecting unstable periodic orbits in chaotic systems. Physical Review E 60, 6172–6175.

Schmelcher, P. and Diakonos, F. K. (1997). Detecting Unstable Periodic Orbits of Chaotic Dynamical Systems. Physical Review Letters 78, 4733–4736.