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Matsika, Spiridoula; David R Yarkony (1 August 2001). "On the effects of spin-orbit coupling on conical intersection seams in molecules with an odd number of electrons. I. Locating the seam". Journal of Chemical Physics. 115 (5): 2038. Bibcode:2001JChPh.115.2038M. doi:10.1063/1.1378324.
Kang, Hyuk; Kang Taek Lee; Boyong Jung; Yeon Jae Ko; Seong Keun Kim (October 2002). "Intrinsic Lifetimes of the Excited State of DNA and RNA Bases". J. Am. Chem. Soc. 124 (44): 12958–12959. doi:10.1021/ja027627x. PMID12405817.