BALLA KOVÁCS, A.; SZABÓ, A.; BARTÁNÉ SZABÓ, E. Studies of the influences of different N fertilizers and Microbion UNC bacterial fertilizer on the nutrient content of soil. Acta Agraria Debreceniensis, [S. l.], n. I, p. 134–140, 2010. DOI: 10.34101/ACTAAGRAR/I/8391. Disponível em: https://ojs.lib.unideb.hu/actaagrar/article/view/8391. Acesso em: 15 may. 2021.