Méndez Natera, J., O. Medina Leota, J. Fendel Alvarez, e J. Merazo Pinto. «Effect of Four Tillage Methods and Two Forms of Urea Placement in an Ultisol of Savanna on Vegetative and Flowering Traits of Three Sesame Culltivars, Sesamum Indicum L.». Revista Da Faculdade De Agronomia Da Universidade De Zulia, Vol. 16, n. 5, Janeiro de 2012, https://produccioncientifica.luz.edu.ve/index.php/agronomia/article/view/26276.