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V Aquilanti, H M Haggard, R G Littlejohn, L Yu, Semiclassical analysis of Wigner 3j-symbol, Journal of Physics A Mathematical and Theoretical 40 (2007) 5637

J C Baez, J D Christensen, G Egan, Asymptotics of 10j symbols, Classical and Quantum Gravity 19 (2002) 6489

J W Barrett, C M Steele, Asymptotics of relativistic spin networks, Classical and Quantum Gravity 20 (2003) 1341

P P Boalch, Regge and Okamoto Symmetries, Communications in Mathematical Physics 276 (2007) 117

G Carbone, M Carfora, A Marzuoli, Quantum states of elementary three-geometry, Classical and Quantum Gravity 19 (2002) 3761

M Cirafici, L Griguolo, D Seminara, R J Szabo, Morita duality and noncommutative Wilson loops in two dimensions, Journal of High Energy Physics 2005 (2005) 030

F Conrady, L Freidel, Quantum geometry from phase space reduction, Journal of Mathematical Physics 50 (2009) 123510

F Costantino, 6j–symbols, hyperbolic structures and the volume conjecture, Geometry & Topology 11 (2007) 1831

R J Dowdall, H Gomes, F Hellmann, Asymptotic analysis of the Ponzano–Regge model for handlebodies, Journal of Physics A Mathematical and Theoretical 43 (2010) 115203

M Dupuis, E Livine, Pushing the asymptotics of the 6j-symbol further, Physical Review D 80 (2009) 024035

M Dupuis, E R Livine, The 6j-symbol: recursion, correlations and asymptotics, Classical and Quantum Gravity 27 (2010) 135003

L Freidel, D Louapre, Asymptotics of 6j and 10j symbols, Classical and Quantum Gravity 20 (2003) 1267

J Hackett, S Speziale, Grasping rules and semiclassical limit of the geometry in the Ponzano–Regge model, Classical and Quantum Gravity 24 (2007) 1525

H M Haggard, R G Littlejohn, Asymptotics of the Wigner 9j-symbol, Classical and Quantum Gravity 27 (2010) 135010

E Livine, S Speziale, J Willis, Towards the graviton from spinfoams: Higher order corrections in the 3D toy model, Physical Review D 75 (2007) 024038

Y Mohanty, The Regge symmetry is a scissors congruence in hyperbolic space, Algebraic & Geometric Topology 3 (2003) 1

K Noui, P Roche, Cosmological deformation of Lorentzian spin foam models, Classical and Quantum Gravity 20 (2003) 3175

T Ohtsuki, Problems on invariants of knots and 3–manifolds, from "Invariants of Knots and 3--manifolds (Kyoto 2001)", Geometry & Topology Monographs (2004) 377

D Oriti, ____, Reports on Progress in Physics 64 (2001) 1703

M Ragni, A C P Bitencourt, C Da S. Ferreira, V Aquilanti, R W Anderson, R G Littlejohn, Exact computation and asymptotic approximations of 6j symbols: Illustration of their semiclassical limits, International Journal of Quantum Chemistry 110 (2010) 731

T Regge, R M Williams, Discrete structures in gravity, Journal of Mathematical Physics 41 (2000) 3964

J Roberts, Asymptotics and 6j–symbols, from "Invariants of Knots and 3--manifolds (Kyoto 2001)", Geometry & Topology Monographs (2002) 245

C Rovelli, S Speziale, A semiclassical tetrahedron, Classical and Quantum Gravity 23 (2006) 5861