“THEORETICAL STUDY OF CONCERTED DIELS-ALDER REACTIONS BETWEEN DIMETHYL 1,2,4,5-TETRAZINE-3,6-DICARBOXYLATE AND DIENOPHILES” (2009) Al-Nahrain Journal of Science, 12(1), pp. 14–23. Available at: https://anjs.edu.iq/index.php/anjs/article/view/1257 (Accessed: 15 April 2025).