Belmonte, M., Hsieh, C.-F., Figueroa, C., Campos, J. L. and Vidal, G. (2011) “Effect of free ammonia nitrogen on the methanogenic activity of swine wastewater”, Electronic Journal of Biotechnology. Valparaíso, Chile, 14(3). Available at: https://preprints.pucv.cl/index.php/ejbiotechnology/article/view/v14n3-11 (Accessed: 19 September 2024).