Ahmed, F., M. Z. Rahman, M. F. Khan, M. A. Rashid, and M. S. Rahman. “β-Amyrin As an Analgesic Component of the Leaves of Callistemon Citrinus (Curtis) Skeels: Chemical, Biological and in Silico Studies”. Bangladesh Journal of Botany, vol. 48, no. 2, June 2019, pp. 379-85, doi:10.3329/bjb.v48i2.47685.