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M. M. Heraviac, M. Rahimizadeha, M. Seyfa, A. Davoodniaa & M. Ghassemzadehb
Bicyclic Compounds Derived from 4-Amino-3-Mercapto-1,2,4-Triazoles: Facile Routes To 1,2,4-Triazolo [3,4-b][1,3,4]Thiadiazoles and 1,2,4-Triazolo[3,4-b][1,3,4]Thiadiazines
Phosphorus, Sulfur, and Silicon and the Related Elements Volume 167, Issue 1, 2000 pages 211-217
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http://dx.doi.org/10.1080/10426500008082400