S. Ahmad, S. Qureshi, A.- ur-. Rehman, Z.- ur-. Rehman, and Y. Badar, “?ANTIPYRETIC AND ANALGESIC ACTIVITY IN CRUDE ETHANOLIC EXTRACT OF CALENDULA OFFICINALIS LINN”, Pakistan Journal of Scientific & Industrial Research, vol. 43, no. 1, pp. 50–54, May 2000.