...S.Ansoldi¹

E-mail address: ansoldi@trieste.infn.it

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...A.Aurilia²

E-mail address: aaurilia@csupomona.edu

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...E.Spallucci³

E-mail address: spallucci@vstst0.ts.infn.it

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...fractal⁴

This interpretation, clearly implied in the book by Feynman and Hibbs[10], was revisited many years ago by Abbott and Wise[12], and reviewed by the authors in the larger, but mostly unexplored context of the microscopic structure of quantum spacetime[7,8].

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