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A. Yu. Ivanov, S. G. Stepanian, V. A. Karachevtsev, and L. Adamovicz, Tautomers of 6-thiopurine in low-temperature Ar matrices: FTIR spectroscopy analysis and quantum mechanical calculations, Low Temp. Phys. 48, (2022) [Fiz. Nyzk. Temp. 48, 340-350, (2022)] DOI: https://doi.org/10.1063/10.0009734.