Innovation-ecofriendly employment of waste paper for producing lightweight aggregate for concrete. Periodicals of Engineering and Natural Sciences, [S. l.], v. 8, n. 1, p. 89–99, 2020. DOI: 10.21533/pen.v8.i1.1027. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/1027. Acesso em: 13 jun. 2026.