Danared, H., Andersson, H., Astner, G., Barany, A., Defrance, P., & Rachafi, S. (1987). Angular Differential Cross-sections for High-charge Low-energy Ar Colliding With Ar. Journal of Physics B: Atomic, Molecular and Optical Physics, 20(5), L165-L170. https://doi.org/10.1088/0022-3700/20/5/006 (Original work published 1987)