Closs, G.L.; Calcaterra, L.T.; Green, N.J.; Penfield, K.W.; Miller, J.R.. (1986). «Distance, stereoelectronic effects, and the Marcus inverted region in intramolecular electron transfer in organic radical anions» J. Phys. Chem. 90: 3673–3683. doi:10.1021/j100407a039..