Fussen, D., & Kubach, C. (1986). Theoretical-study of Mutual Neutralization in H+-h- Collisions At Low-energy (0.02-20 Ev). Journal of Physics B: Atomic, Molecular and Optical Physics, 19(1), L31-L34. https://doi.org/10.1088/0022-3700/19/1/006 (Original work published 1986)