@inproceedings{Zipfel:2016zk, author = "Zipfel, Antonia", title = "{Plebanski sectors of the Lorentzian 4-simplex amplitude}", doi = "10.22323/1.224.0181", booktitle = "Proceedings of Frontiers of Fundamental Physics 14 {\textemdash} PoS(FFP14)", year = 2016, volume = "224", pages = "181" }