Machado, Walter Coutinho, and Johanna Döbereiner. “Further Studies on the Physiology of <i>Azotobacter paspali< i> and Its Dependence on the Plant (<i>Paspalum notatum< I>)”. Pesquisa Agropecuaria Brasileira 4, no. 1 (April 15, 2014): 53–58. Accessed November 11, 2025. https://apct.sede.embrapa.br/pab/article/view/17777.