Bol, A., Leleux, P., & Macq, P. (1982). A Measurement of the Neutron-proton Differential Cross-section At Extreme Forward and Backward Angles Between 45 and 75 Mev. Czechoslovak Journal of Physics : europhysics journal, 32(3), 319-320. https://doi.org/10.1007/BF01602078 (Original work published 1982)