Cultivation of lettuce fertilized with controlled-release nitrogen fertilizer and urea . Bioscience Journal [online], 2015. [online], vol. 31, no. 4, pp. 997–1003. [Accessed14 December 2025]. DOI 10.14393/BJ-v31n4a2015-26122. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/26122.