Halim, M., K. Akhter, M. Hasan, M. Rahman, U. Romman, and M. Ahmed. “Synthesis of Potential Pharmaceutically Active Dihydropyrimidine-2-Oxo and Their 2-Thio Analogues”. Bangladesh Journal of Scientific and Industrial Research, vol. 53, no. 4, Dec. 2018, pp. 327-32, doi:10.3329/bjsir.v53i4.39198.