Agboola, D. A., Idowu, W. F., & Kadiri, M. (2006). Seed germination and seedling growth of the Mexican sunflower Tithonia diversifolia (Compositae) in Nigeria, Africa. Revista De Biología Tropical, 54(2), 395–402. https://doi.org/10.15517/rbt.v54i2.13881