@phdthesis {10.5445/IR/1000071245, AUTHOR = {Hirsch, Andreas}, TITLE = {Mono- and polychromatic ground states for semilinear curl-curl wave equations}, SCHOOL = {Karlsruhe Institute of Technology (KIT)}, YEAR = {2017}, MONTH = {jun}, URL = {https://doi.org/10.5445/IR/1000071245}, }