Measurement of Helium-Helium Scattering Cross Section at Low Temperatures
Daniel E. Oates and John G. King
Phys. Rev. Lett. 26, 735 (1971) - Published 29 March, 1971
Excitation of Atomic Hydrogen by Electron and Proton Impact
Kalidas Bhadra and A. S. Ghosh
Phys. Rev. Lett. 26, 737 (1971) - Published 29 March, 1971