KUMAR, N.; KUMAR, J. Efficiency 4.0 for Industry 4.0 . Human Technology, [S. l.], v. 15, n. 1, p. 55–78, 2019. DOI: 10.17011/ht/urn.201902201608. Disponível em: https://ht.csr-pub.eu/index.php/ht/article/view/216. Acesso em: 15 jul. 2026.