CHANTAL, Kwizera; ONGOR, Basil T.; BANDUSHUBWENGE, Denis; SOTER, Ndihokubwayo; FELIX, Shabani. Effects of Different Nitrogen Fertilizer Levels on Sunflower Growth and Yield Attributes. Pakistan Journal of Nutrition, Pakistan, v. 17, n. 11, p. 557–562, 2018. DOI: 10.3923/pjn.2018.557.562. Disponível em: https://pjnonline.org/pjn/article/view/2640. Acesso em: 30 aug. 2025.