GUVENC, I; KARATAS, A; KAYMAK, H C. Effect of foliar applications of urea, ethanol and putrecine on growth and yield of lettuce (Lactuca sativa). The Indian Journal of Agricultural Sciences, Delhi, India, v. 76, n. 1, 2011. Disponível em: https://epubs.icar.org.in/index.php/IJAgS/article/view/2546. Acesso em: 6 jun. 2026.