This article has been retracted: please see Elsevier Policy on Article Withdrawal (http://www.elsevier.com/locate/withdrawalpolicy). Please note that this retraction notice was updated in July 2020 to add that the first author Alexis Larranaga takes full responsibility. This article has been retracted at the request of the Editor-in-Chief. The text of the present article plagiarizes part of a paper that had already appeared in [Adv. High Energy Physics, P. Nicolini, A. Orlandi, E. Spallucci, The Final Stage of Gravitationally Collapsed Thick Matter Layers, Vol. 2013 (2013), Article ID 812084, http://dx.doi.org/10.1155/2013/812084]. One of the conditions of submission of a paper for publication is that authors declare explicitly that their work is original and has not appeared in a publication elsewhere. Re-use of any data should be appropriately cited. As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process.