Imran, H., A. ur Rahman, T. Sohail, S. I. H. Taqvi, and Z. Yaqeen. “Onosma Bracteatum Wall: A Potent Analgesic Agent”. Bangladesh Journal of Medical Science, vol. 17, no. 1, Jan. 2018, pp. 36-41, doi:10.3329/bjms.v17i1.35276.