1. M. Karplus, Weak interactions in molecular quantum mechanics, Rev. Mod. Phys.
32, 455–460(1960).
2. A. B. Zahlan (ed.), The Triplet State, Proceedings of an International Symposium held at the American University of Beirut, Lebanon, Cambridge Univ. Press, Cambridge (1967).
3. A. Carrington, D. H. Levy, and T. A. Miller, in: Advances in Chemical Physics (I. Prigogine and S. A. Rice, eds.), Vol. 18, pp. 149–248, Wiley-Interscience, New York (1970).
4. C. A. Hutchison and B. W. Mangum, Paramagnetic resonance absorption in naphthalene in its phosphorescent state, J. Chem. Phys.
29, 952–953 (1958);
5. C. A. Hutchison and B. W. Mangum, Paramagnetic resonance absorption in naphthalene in its phosphorescent state, J. Chem. Phys.
34, 908–922 (1961).