H. D. Zen and J. B. Brandão, “Competitiveness of hydroponic production of leafy vegetables in Brazil”, Rev. Polit. Agric., vol. 28, no. 1, p. 115, Aug. 2019, Accessed: Sep. 20, 2026. Available: https://rpa.sede.embrapa.br/RPA/article/view/1381