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This paper was withdrawn as it may have appeared elsewhere, although in a different form.

The paper has bene withdrawn by the author.

The paper has been withdrawn by the author due to a gap in Proof of Theorem 1.1.

The original version of this paper has been withdrawn by the authors and merged with the revised version of astro-ph/9702014.

This paper has been withdrawn by the author because eq.(4) and those subsequent are incorrect.

This paper has been withdrawn by the author due to essential mistakes in some previous versions.

This paper is withdrawn because its results have been previously reported in arxiv hep-th/0507200.

The paper is withdrawn by the author, due to the fact that in Larsson's Phys.Lett. A256 (1999) 245-252 (quant-ph/9901074) a similar model was published with even higher efficiency.

This paper has been withdraw by the author due to adding more modeling results.

This paper has been withdrawn due to crucial errors.

This paper has been withdrawn

This paper has been withdrawn

Temporarly withdrawn. Larger version of this review is currently in preparation.

This paper has been withdrawn by the author.

In this essay we marshal evidence suggesting that Einstein gravity may be an emergent phenomenon, one that is not ``fundamental'' but rather is an almost automatic low-energy long-distance consequence of a wide class of theories.…

This paper has been withdrawn by the authors. This is due to the fact that it has been substantially revised. As a consequence title and aim of the contents

The paper has been permanently removed due to copyright issues.

This paper has been withdrawn by the author, due to an error in the proof of lemma 7.4. However, numerical evidence strongly suggest that this lemma is true.

The paper has been withdrawn

This paper has been withdrawn by the author due to some error in the result