N. GHOSH; S. GANGULY; A. K. BANIK. Comparison Of Microbial Humic Acid Produced By Aspergillus Niger X1 And Soil Humic Acid. International Journal of Pharma and Bio Sciences, [S. l.], v. 2, n. 2`, p. 479–484, 2011. Disponível em: https://ijpbs.net/index.php/journal/article/view/853. Acesso em: 23 jul. 2026.