Wang, K., Emary, C., Xu, M., Zhan, X., Bian, Z., Xiao, L., & Xue, P. (2018). Violations of a Leggett-Garg inequality without signaling for a photonic qutrit probed with ambiguous measurements. Physical Review A, 97(2), Article 020101(R). https://doi.org/10.1103/PhysRevA.97.020101