J. Electron Spectrosc. Relat. Phenom.

Brion, C. E., Tan, K. H., van der Wiel, M. J., & van der Leeuw, P. E. (1979). Dipole oscillator strengths for the photoabsorption, photoionization and fragmentation of molecular oxygen. J. Electron Spectrosc. Relat. Phenom., 17, 101–119.