« A comparison of nitrate level in spinach grown both under different densities in aquaponic system and under natural growth conditions ». The Annals of the University Dunarea de Jos of Galati. Fascicle VI - Food Technology 37, no. 2 (novembre 15, 2013): 47–58. Consulté le novembre 2, 2026. https://ojs.ugal.ro/index.php/food/article/view/2156.