E. Welter, R. Chernikov, M. Herrmann, and R. Nemausat "A beamline for bulk sample x-ray absorption spectroscopy at the high brilliance storage ring PETRA III" AIP Conference Proceedings 2054, 040002 (2019); https://doi.org/10.1063/1.5084603
Please refer also to the use of the DESY photon facility. All publications have to contain a corresponding sentence, which is listed here.