Roman M. Balabin (2009). "Tautomeric equilibrium and hydrogen shifts in tetrazole and triazoles: Focal-point analysis and ab initio limit". J. Chem. Phys.131 (15): 154307. doi:10.1063/1.3249968. Bibcode: 2009JChPh.131o4307B.
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Roman M. Balabin (2009). "Tautomeric equilibrium and hydrogen shifts in tetrazole and triazoles: Focal-point analysis and ab initio limit". J. Chem. Phys.131 (15): 154307. doi:10.1063/1.3249968. Bibcode: 2009JChPh.131o4307B.