Zagier, Don Max Planck Institute for Mathematics, Max Planck Society;
https://doi.org/10.2140/gt.2013.17.1 (Publisher version)
arXiv:0902.3113.pdf (Preprint), 452KB
Garoufalidis, S., & van der Veen, R. (2013). Asymptotics of classical spin networks: Appendix by Don Zagier. Geometry & Topology, 17(1), 28-33. doi:10.2140/gt.2013.17.1.