1.Jones,G.; Jones,D.G.;
Thiazolopyridinium salts. Part I. Synthesis of some thiazolo[3,2-a]-pyridinium salts
Journal of the Chemical Society [Section] C
1967; 515 - 518
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http://dx.doi.org/10.1039/j39670000515
Cyclic quaternary ammonium salts. Part IX. 1,1 -Azoimidazo[1,2-a]-pyridinium salts
Journal of the Chemical Society [Section] C: Organic;
1971; 3280,3283;
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http://dx.doi.org/10.1039/j39710003280