van Amersfoort, P. W., Best, R. W. B., Vanbuuren, R. ., Delmee, P. F. M., Faatz, B. ., van der Geer, C. A. J., … van der Wiel, M. J. (1990). Status and Research Objectives of the Dutch Free-Electron Laser for Infrared Experiments. Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment, 296, 217-221. https://doi.org/10.1016/0168-9002(90)91212-t (Original work published)
DIFFER