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Beak, P.; Fry, F.S., Jr.; Lee, J.; Steele, F., Equilibration studies. Protomeric equilibria of 2- and 4-Hydroxypyridines, 2- and 4-hydroxypyridines, 2- and 4-mercaptopyridines, and structurally related compounds in the gas phase, J. Am. Chem. Soc., 1976, 98, 171-179. [all data]