Ahmed, M Glasuddin, UKR Romman, Kawsari Akhter, Monarul Islam, Mohammad Mosharrag Hossain, and Md Ershad Halim. “A Convenient Synthesis of Substituted Spiro[5.5]Undecanes Using Lewis Acid Catalysts”. Dhaka University Journal of Science 60, no. 1 (April 15, 2012): 121–124. Accessed October 1, 2025. https://www.banglajol.info/index.php/DUJS/article/view/10349.