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Handa, T.; Utena, Y.; Yajima, H.; Ishii, T.; Morita, H., Excimer emission in protonated pyridine systems. 1. Fluorescence spectroscopy of protonated pyridine and its methyl derivatives in rigid glass solution at 77 K, J. Phys. Chem., 1986, 90, 2589-2596. [all data]