Related papers: Modified Dirac equation

This paper has been withdrawn by the author(s) in the light of several other works available and due to a misunderstanding in the authorships.

This paper has been withdrawn by the authors due to crucial error in the main proof (located in Section 2.4). The authors apologize for any inconveniences.

This paper has been withdrawn by the author due to a coming paper completely superseding it.

This paper has been withdrawn.

This paper has been withdrawn.

This paper has been withdrawn by the authors due to an unlikely results.

This paper has been withdrawn

This paper has been withdrawn by the author, since the author does not have enough time to answer every questions on this result.

This paper has been withdrawn by the author(s), due the final version in math.QA/0604564

This paper has been withdrawn by the author.

This paper has been withdrawn by the author, due a crucial error in the main idea.

This paper has been withdrawn by the author due to a crucial error in equation.

This paper has been withdrawn by the author due to a crucial error.

This paper has been withdrawn by the author due to a crucial errors.

This paper was withdrawn by the author. It turns out that similar ideas have been presented before. The author apologizes.

This paper has been withdrawn by the authors because the paper is largely revised and improved, and to appear in Mechanics Research Communications.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author due to some errors.

This paper has been withdrawn by the author due to an erro thereon line -2 of page 4.

This paper has been withdrawn by the author due to errors.