RUŽA, A.; KREITA, Dz.; KROTOVS, M.; MAĻECKA, S.; STRAMKALE, V. Nitrogen Fertilizer Use Efficiency in Winter Wheat Trials. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 232–237, 2006. DOI: 10.17770/etr2003vol1.2011. Disponível em: https://journals.ru.lv/index.php/ETR/article/view/2011.. Acesso em: 7 may. 2024.