@article {3618,
	title = {Broadband High-Resolution X-Ray Frequency Combs},
	journal = {Nature Photonics},
	volume = {8},
	year = {2014},
	pages = {520-523},
	author = {Cavaletto, Stefano M. and Harman, Zolt{\'a}n and Ott, Christian and Buth, Christian and Pfeifer, Thomas and Keitel, Christoph H.}
}
