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This paper has been withdrawn by the author, since some results of the paper have been already obtained in [J.~Lewandowski, Class.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.]
This paper is withdrawn by the authors.
This paper was withdrawn by the authors because it has been supplanted by gr-qc/0311007 and gr-qc/0311038.
This paper has been removed by arXiv administrators because of overlap with gr-qc/0303034. This paper also has excessive overlap with the following papers also written by the authors or their collaborators: gr-qc/0601133, gr-qc/0602012,…
This paper has been withdrawn by the authors due to the inconsistency of the computations used for extra dimensions and the fractal dimensional approach of the paper. An updated version of the paper will be published under a different…
This paper has been withdrawn, because the result turned out to be well known.
This paper has been withdrawn: it has been merged with the preprint to which it refers.
This paper has been withdrawn by the author due to errors and bad formalization.
This paper is withdrawn because its results have been previously reported in arxiv hep-th/0507200.
The paper had been withdrawn due to some technical problems. New version will be uploaded near future.
This paper has been withdrawn by the author due to a serious flaw that needs to be fixed. That is in progress by the author.
This submission has been withdrawn by the author and superseded by arXiv:0804.0744.
This paper has been withdrawn by the authors.
This paper has been withdrawn. A more satisfactory account of the results it was supposed to present will appear in a series of papers starting with hep-th/9712256 and hep-th/9712258
This paper has been withdrawn since we combine this paper with math.AC/0503685. All contents of the paper have been moved to math.AC/0503685.
This paper has been removed by arXiv administrators because of overlap with gr-qc/9910015 and hep-th/0308070. It also has excessive overlap with the following papers also written by the authors or their collaborators: gr-qc/0509047,…
This results in this paper have been merged with the result in arXiv:1003.0167. The authors would like to withdraw this version. Please see arXiv:1008.5356 for the merged version.
This paper has been withdrawn since it contains some discrepancy with othe authers's recent result. We will not post this until this discrepancy is resolved.
This paper has been removed by arXiv administrators because of excessive overlap with gr-qc/0506062.
This paper has been withdrawn. The contents of this paper can now be found in 0907.3000, which combines the erstwhile 0901.2981 and 0901.2982 in a somewhat compact form.