Zou, Y.-Q., Wu, L.-N., Liu, Q., Luo, X.-Y., Guo, S.-F., Cao, J.-H., Tey, M. K., & You, L. (2018). Beating the classical precision limit with spin-1 Dicke states of more than 10,000 atoms. PNAS, 115(25), 6381-6385. doi:10.1073/pnas.1715105115.