HASSAN, F.; فائق. effect of lead and nickel on growth and some physiological aspects of Helinthus annus L. Journal of Education and Science (JES), [S. l.], v. 22, n. 2, p. 47–60, 2009. DOI: 10.33899/edusj.2009.57670. Disponível em: https://rjps.uomosul.edu.iq/edusj/article/view/17505. Acesso em: 4 aug. 2025.