A. H. Ekeocha and P. O. Fakolade, “Effect of graded levels of Mexican sunflower leaf (Tithonia diversifolia Hemsl. A. Gray) meal on the feed intake of ewe during the entire gestation period of 150 days”, Sci. J. Anim. Sci., vol. 1, no. 3, pp. 107-118, Sep. 2012.