Barbosa, Antusia dos Santos, et al. “USE OF SERUM AS A SUBSTRATE FOR PRODUCTION OF MARC: KINETIC STUDY OF THE PRODUCTION OF ETHANOL”. Revista Verde De Agroecologia E Desenvolvimento Sustentável, vol. 5, no. 1, Mar. 2010, pp. 07-25, https://www.gvaa.com.br/revista/index.php/RVADS/article/view/240.