Related papers: A comment on "Computational periodicity as observe…

This paper has been withdrawn.

This paper has been withdrawn by the author(s), due to double submission. You can find it under: physics/0208019

This paper has been retracted, for obvious reasons.

The article is taken out.

The paper has been withdrawn.

This paper has been withdrawn by the author, since now all four parts of the review are available as a single file 0804.1639. I also made some revision of the text in order to avoid misprints and some inaccurate expressions.

This paper has been withdrawn by the author.

This paper has been withdrawn by the authors as requested by the journal.

This paper has been withdrawn by the authors after discussing its content with Dr. J. Madsen.

This paper has been withdrawn by the authors. The authors have now written two separate papers, one theoretical (A. Smerzi, A. Trombettoni, P. G. Kevrekidis, and A. R. Bishop Phys. Rev. Lett. 89, 170402 (2002)) and one experimental (F. S.…

This paper has been withdrawn by the author(s)

This paper has been withdrawn by the author(s)

This paper has been withdrawn by the author.

This paper has been withdrawn by the authors because the paper is largely revised and improved, and to appear in Mechanics Research Communications.

This paper has been withdrawn by the author, as it is now incorporated in 0901.4506 (v4)

This paper has been withdrawn by the author.

This paper has been withdrawn, as it should not have been a new submission. Please instead see the latest version of arXiv:0904.0436.

This paper has been withdrawn by the authors. We have discovered an error in the evaluation of the diagram, which invalidates our conclusion.

This paper has been withdrawn.

This paper has been withdrawn by the author, since some results of the paper have been already obtained in [J.~Lewandowski, Class. Quantum Grav. 9 (1992), no. 10, L147--L151.]