Islam, M. S. and Ueda, I. (2007) “Base Catalyzed Intra Molecular Wittig Reaction Between [2-Ethoxy-3-(4-Substituted Phenyl)-2-Propenylidene] Triphenyl Phosphonium Bromides With Bifunctional Carbonyl Compounds”, Dhaka University Journal of Pharmaceutical Sciences, 3(1). doi: 10.3329/dujps.v3i1.176.