1. The formation of helium molecules
2. The formation of helium molecules. II
3. The theory of scattering by a rigid rotator
4. Auerbach, D., Cacak, R., Caudano, R., Gaily, T. D., Keyser, J., McGowan, J. W., Mitchell, J. B. A., and Wilk, S. J. (1977). Merged electron-ion beam experiments. I. Method and measurements of e-H+2 and e-H+3 dissociative recombination cross sections.”