J. Electron Spectrosc. Relat. Phenom.

Brion, C. E., Hamnett, A., Wight, G. R., & van der Wiel, M. J. (1977). Branching ratios and partial oscillator strengths for the photoionization of NH3 in the 15-50 eV region. J. Electron Spectrosc. Relat. Phenom., 12, 323–334.