RESEARCH DEVELOPMENTS MECHANICAL PROPERTIES OF CONCRETE FROM THE INTRODUCTION OF NANO-ADDITIVES MAGNETITE. Journal of open systems evolution problems, [S. l.], v. 17, n. 1, p. 71–75, 2021. Disponível em: https://peos.kaznu.kz/index.php/peos/article/view/86. Acesso em: 5 jul. 2026.