Stertz, Sônia C., Patricia T. P. S. Penteado, and Renato João S. de Freitas. “Nitrites and Nitrates in Horticultures Produced by the Conventional, Organic and Hydroponic Cultivation Systems in the Metropolitan Region of Curitiba”. Instituto Adolfo Lutz Journal - RIAL 63, no. 2 (December 30, 2004): 200–7. Accessed April 26, 2025. https://periodicos.saude.sp.gov.br/RIAL/article/view/34851.