Related papers: String amplitudes and the Penrose limit

This paper has been withdrawn.

This paper has been withdrawn by the author because there are some typos in proofs.

This paper has been withdrawn by the author due to some problems.

This paper has been withdrawn by the authors, due to an accuracy error in the Maple and Fortran calculations which completely changed the results.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due to an error in the derivation.

This paper has been withdrawn by the author, since most of the results have been published before.

This paper has been withdrawn by the author due to a crucial error related with the consideration of regular points

This paper has been withdrawn by the author, due an error in claim 1.

None. This paper has been withdrawn by the authors.

This paper is withdrawn due to a mistake. The revised version with a new tiltle can be found in hep-ph/0502199.

The paper was retracted.

The paper has been withdrawn

The paper has been withdrawn by the author due to a the manuscript error.

Paper withdrawn, see math-ph/0505072

This paper has been withdrawn by the authors due to a mistake in one of the proofs

This paper has been withdrawn by the authors because M. Aschenbrenner pointed out that the proof of theorem 3.1 was incorrect.

This paper has been withdrawn by the author(s) due to the discussion was made on the basis of linear term merely, which is incomplete.

This paper has been withdrawn by the author.