The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
B. Steffen et al., “Electro-Optical Bunch Length Detection at the European XFEL”, in Proc. FEL'19, Hamburg, Germany, Aug. 2019, pp. 360-363. doi:10.18429/JACoW-FEL2019-WEP015