C. B. de Abreu, B. L. do Sacramento, A. T. Alves, S. C. Moura, M. S. Pinelli, and A. D. de Azevedo Neto, “Nutritional and biochemical changes induced by lead in sunflower (Helianthus annuus L.)”, Semina: Ciênc. Agrár., vol. 37, no. 3, pp. 1229–1242, Jun. 2016.