SITUMORANG, Humala. The Effect of the Ban on Nickel Exports on the Economic Profitability of PT Vale Indonesia, Tbk from 2015 - June 2020. Fundamental Management Journal, [S. l.], v. 6, n. 1p, p. 73–82, 2021. DOI: 10.33541/fjm.v6i1p.2834. Disponível em: http://ejournal.uki.ac.id/index.php/jm/article/view/2834. Acesso em: 3 apr. 2025.