P. Ayoola, A. Adeyeye, and O. Onawumi, “Trace Elements and Major Minerals Evaluation of Spondias mombin, Vernonia amygdalina and Momordica charantia Leaves”, Pak. J. Nutr., vol. 9, no. 8, pp. 755–758, Jul. 2010, doi: 10.3923/pjn.2010.755.758.