1. W.C.McC. Lewis, J. Chem. Soc. Trans. 113, 471 (1918)
2. W.O. Kermack, R. Robinson, J. Chem. Soc. Trans. 121, 427 (1922)
3. M.A. Gilbert, J.E. Baggott, Essentials of Molecular Photochemistry (Blackwell Scientific Publications, Oxford, UK, 1991)
4. N.J. Turro, V. Ramamurthy, J.C. Scaiano, Principles of Molecular Photochemistry (University Science Books, Sausalito, CA, USA, 2009)
5. I. Asimov, Photosynthesis (Basic Books, New York, NY, USA, 1968)