da Silva, S. D. P., M. Z. B.- Cavalcante, G. P. de S. T. Silva de Oliveira, Raylla da Rocha Lima, and A. R. de M. Chaves. “Growth of Ornamental Sunflowers in Two Growing Seasons under Semiarid Conditions”. Emirates Journal of Food and Agriculture, Vol. 30, no. 5, May 2018, pp. 381-8, doi:https://doi.org/10.9755/ejfa.2018.v30.i5.1681. Accessed 9 Apr. 2020.