Silva, J. A. L., Pereira, T. M. S. e Azevedo, P. V. (2021) “Biogas production with the use of animal manure: a practice for obtaining socioeconomic and environmental benefits”, Boletim de Geografia, 390, p. 1-13, e46743. doi: 10.4025/bolgeogr.v39.a2021.e46743.