LEE, Seungju. Impact of coffee ground on ammonia concentration. Open Science Journal, [S. l.], v. 6, n. 4, 2021. DOI: 10.23954/osj.v6i4.3046. Disponível em: https://osjournal.org/ojs/index.php/OSJ/article/view/3046. Acesso em: 17 sep. 2025.