“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 ”. 2024. Latakia University Journal -Basic Sciences Series 46 (3): 59-76. https://journal.latakia-univ.edu.sy/index.php/bassnc/article/view/17170.