@article{voi_2019.2155, title = {Karl-Armin Tröger 1931 – 2019}, author = {Voigt, Thomas and Linnemann, Ulf and Voigt, Silke and Horna, Frank and Breitkreuz, Christoph}, year = {2019}, journal = {Geowissenschaftliche Mitteilungen GMit (ARGE GMit) Bonn}, volume = {75}, pages = {95}, url = {https://web.archive.org/web/20190912102511/https://www.geoberuf.de/files/Publikation/GMIT_75.pdf}, note = {authors list might not be complete} }