Elmusharaf HA, Barakat IE, Saeed AEM. Synthesis of Some Bigienelli Compounds from Thiosemicarbazide use ZnCl2 as Catalyst under Solvent Free Condition. IJSBAR. 2015;23(1):383-391. Accessed August 4, 2026. https://gssrr.org/JournalOfBasicAndApplied/article/view/4231