TOVMA TLEPPAEV, N. A. A. M. Increasing energy efficiency and reducing energy costs through the creation of national standards. Journal of Economic Research & Business Administration, [S. l.], v. 114, n. 2, 2016. Disponível em: https://be.kaznu.kz/index.php/math/article/view/1275. Acesso em: 21 nov. 2024.