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O. A. Ponomarev, V. G. Mitina and S. I. Kotelevskii,"Nature of electronic transitions in absorption spectra of phenyl derivatives of 1,3,4-sym-triazole ",
Theoretical and Experimental Chemistry, 1994, Vol 29, Num 2, 117-119.
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dx.doi.org/10.1007/BF00530609
