Hansen, U. B., Bertelsen, M., Stahn, J., & Lefmann, K. (2017). An optional focusing SELENE extension to conventional neutron guides: a case study for the ESS instrument BIFROST. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 852, 46-56. https://doi.org/10.1016/j.nima.2017.01.075
