Comparison of two new digester designs for bio-gas production using cattle dung as substrate . Indian Journal of Animal Production and Management, [S. l.], v. 33, n. 3-4, p. 31–33, 2017. Disponível em: https://journals.acspublisher.com/index.php/ijapm/article/view/7087. Acesso em: 1 sep. 2025.