أحمد ث. . “Synthesis of Some New Heterocyclic Compounds [(-1,3,4-oxadiazole), (1,3,4-Oxadiazole-2-thiol), (1,3,4-thiadiazole), (1,2,4-Triazin-5-one), (1,2,4-Triazole-3-thiol)] Containing Fluorine Moiety, Derived from 9H-Fluorene-2-Carboxylic Acid”. Tishreen University Journal -Basic Sciences Series, vol. 46, no. 3, Nov. 2024, pp. 59-76, https://journal.tishreen.edu.sy/index.php/bassnc/article/view/17170.