@misc {1000104170, AUTHOR = {Mandel, Rainer}, TITLE = {Nonlinear {H}elmholtz equations and systems}, HOWPUBLISHED = {Habilitation thesis, Karlsruhe Institute of Technology (KIT)}, YEAR = {2019}, MONTH = {dec}, URL = {https://publikationen.bibliothek.kit.edu/1000104170}, }