Laser Improves Biogas Production by Anaerobic Digestion of Cow Dung. Baghdad Science Journal, Iraq, Baghdad, v. 15, n. 3, p. 0324, 2018. DOI: 10.21123/bsj.2018.15.3.0324. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/2480.. Acesso em: 27 apr. 2024.