@article{20.500.12614/3449, year = {2023}, url = {http://hdl.handle.net/20.500.12614/3449}, title = {Progress and prospects in nonlinear extreme-ultraviolet and X-ray optics and spectroscopy}, doi = {10.1038/s42254-023-00643-7}, journal = {Nature Reviews Physics}, author = {Chergui, Majed and Beye, Martin and Mukamel, Shaul and Svetina, Cristian and Masciovecchio, Claudio}, }