Mohamed Abdel-Megid. (2023). Part –III: Utilities of Active Methylene Compounds and Heterocycles Bearing Active Methyl or having an Active Methine in the Formation of Substituted and Fused Pyridines. Global Journal of Science Frontier Research, 22(B1), 19–36. Retrieved from https://journalofscience.org/index.php/GJSFR/article/view/102575