GUNAWAN, I.; KARTINA, R. Substitusi Kebutuhan Nitrogen Tanaman Padi Sawah oleh Tumbuhan Air Azolla (Azolla pinnata). Jurnal Penelitian Pertanian Terapan, [S. l.], v. 12, n. 3, 2017. DOI: 10.25181/jppt.v12i3.214. Disponível em: https://jurnal.polinela.ac.id/index.php/jppt/article/view/214. Acesso em: 28 jul. 2021.