“Synthesis, Characterization and Evaluation of Some Pyranopyrazoles and Pyranopyrimidines Derivatives as Antioxidants for Lubricating Oils”, Iraqi Journal of Science, vol. 55, no. 1, pp. 1–11, Dec. 2023, Accessed: Mar. 31, 2025. [Online]. Available: https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/11919