A. H. Curran, R. G. Macdonald, A. J. Stone and B. A. Thrush. (1973). Gas-Phase Electron Paramagnetic Resonance Spectrum and Dipole Moment of NF(1Δ ). Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, 332(1590), 355–363.
doi:10.2307/78328