H. Hu, P. Eberhard, F. Fetzer, and P. Berger. VII European Congress on Computational Methods in Applied Sciences and Engineering - Eccomas Proceedia, 2405, page 8196-8206. (January 2016)
M. Jarwitz, F. Fetzer, R. Weber, and T. Graf. Proceedings of the 36th International Congress on Applications of Lasers & Electro-Optics (ICALEO 2017), Laser Institute of America, (October 2017)
B. Dannecker, M. Abdou Ahmed, and T. Graf. 7th EPS-QEOD EUROPHOTON CONFERENCE "Solid State, Fibre, and Waveguide Coherent Light Sources" , 7, page SSL-5.1. European Physical Society (EPS), European Physical Society (EPS), (2016)