Märkisch, B., Abele, H., Dubbers, D., Saul, H., & Soldner, T. (2020). Accurate Measurement of the Beta-Asymmetry in Neutron Decay Rules out Dark Decay Mode. Journal of Surface Investigation: X-Ray, Synchrotron and Neutron Techniques, 14(S1), S140–S143. https://doi.org/10.1134/s1027451020070319