Balabin, Roman M. (2009). „Tautomeric equilibrium and hydrogen shifts in tetrazole and triazoles: Focal-point analysis and ab initio limit”. Journal of Chemical Physics. 131 (15): 154307. Bibcode:2009JChPh.131o4307B. doi:10.1063/1.3249968.
Balabin, Roman M. (2009). „Tautomeric equilibrium and hydrogen shifts in tetrazole and triazoles: Focal-point analysis and ab initio limit”. Journal of Chemical Physics. 131 (15): 154307. Bibcode:2009JChPh.131o4307B. doi:10.1063/1.3249968.