ONG, KOK TONG, ZHI-QIANG LIU, and MENG GUAN TAY. “Review on the Synthesis of Pyrazine and Its Derivatives”. Borneo Journal of Resource Science and Technology 7, no. 2 (December 27, 2017): 60–75. Accessed January 7, 2025. https://unipub.unimas.my/ojs/index.php/BJRST/article/view/591.