SARKAR, R K; DEB, N; PARYA, M K. Effect of seed treatment and fo’oliar nutrition on growth and productivity of spring surnflower (Helianfhus annuus). The Indian Journal of Agricultural Sciences, Delhi, India, v. 77, n. 3, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/3252. Acesso em: 27 oct. 2025.