Hossain, Md Sahadat, et al. “In-Vitro Antibacterial Properties of Ethanol and Methanol Extracts of Betel Leaves Collected from Different Areas of Bangladesh”. Bangladesh Journal of Microbiology, vol. 34, no. 2, Jan. 2019, pp. 125-7, doi:10.3329/bjm.v34i2.39624.