Influence of ZnO nano-refrigerant in R134a on performance compression systems of refrigeration. Periodicals of Engineering and Natural Sciences, [S. l.], v. 9, n. 3, p. 734–744, 2021. DOI: 10.21533/pen.v9.i3.886. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/886. Acesso em: 29 jul. 2026.