Mathias S., M. Wiesenmayer, F. Deicke, A. Ruffing, L. Miaja-Avila, M. Murnane, H. Kapteyn, M. Bauer, and M. Aeschlimann, Journal Of Physics: Conference Series 148, 012042 (2009).
Zhang Y., X. Shi, M. Guan, W. You, Y. Zhong, T.R. Kafle, Y. Huang, H. Ding, M. Bauer, K. Rossnagel, and S. Meng, Structural Dynamics 9, 014501 (2022).
and 
