Kadhim, N. A., W. M. K. Al-Ani, and I. S. Al-Joboury. “Detection of Lupeol in Calendula Officinalis Grown in Iraq by GC-MS Analysis”. Al Mustansiriyah Journal of Pharmaceutical Sciences, vol. 19, no. 4, Dec. 2019, pp. 69-76, doi:10.32947/ajps.v19i4.636.