Anghel, A., Atchison, F., Blau, B., van den Brandt, B., Daum, M., Doelling, R., … Grigoriev, S. (2009). The PSI ultra-cold neutron source. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 611(2-3), 272-275. https://doi.org/10.1016/j.nima.2009.07.077