Effect of exudates excreted by Trichoderma harzianum on the nitrogen fixation (C2H2- reduction) rate of the cyanobacteria Anabaena variabilis . Journal of Madenat Alelem, [S. l.], v. 1, n. 1, p. 21–28, 2009. Disponível em: https://journal.mauc.edu.iq/index.php/JMAUC/article/view/290. Acesso em: 25 feb. 2026.