Hussain, A. M. Mahmood, et al. “Some Observations on <I>Bursera penicillata< I> (DC.) Engl. (<I>B. Delpechiana< I> Poiss Ex Engl.)”. Indian Forester, vol. 100, no. 5, May 1974, pp. 315-9, doi:10.36808/if/1974/v100i5/26861.