Schmid, C., Kiesel, N., Laskowski, W., Solano, E., Toth, G., Zukowski, M., & Weinfurter, H. (2007). The Entanglement of the Symmetric Four-photon Dicke State. In M., Zukowski, S., Kilin, & J., Kowalik (Eds.), Quantum Communication and Security (pp. 113-122). IOS Press.