Crane, LouisPerez, AlejandroRovelli, Carlo2004-12-032004-12-0320012001http://hdl.handle.net/2003/144310.17877/DE290R-11251enThe American Physical SocietyPhysical Review Letters530Perturbative Finiteness in Spin-Foam Quantum Gravity10.1103/PhysRevLett.87.181301article (journal)