@inproceedings{Siegert:2017yz, author = "Siegert, Thomas", title = "{Positron annihilation in the Milky Way and beyond}", doi = "10.22323/1.285.0056", booktitle = "Proceedings of 11th INTEGRAL Conference Gamma-Ray Astrophysics in Multi-Wavelength Perspective {\textemdash} PoS(INTEGRAL2016)", year = 2017, volume = "285", pages = "056" }