Bol, A., Devescovi, P., Leleux, P., Lipnik, P., Macq, P., & Meulders, J.-P. (1985). Measurement of the Neutron-proton Total Cross-section in the 25-75-mev Range. Physical Review C (Nuclear Physics), 32(2), 623-624. https://doi.org/10.1103/PhysRevC.32.623 (Original work published 1985)