Purba, W., Roy, P., Jannat, S., Begum, S. and Rahman, M. 2020. Microwave-assisted urea catalyzed Knoevenagel condensation of aldehydes with active methylene compounds. Bangladesh Journal of Scientific and Industrial Research. 55, 2 (Jun. 2020), 159–164. DOI:https://doi.org/10.3329/bjsir.v55i2.47637.