P. MASSAMI, Erick; M. MANYAS, Malima; M. MYAMBA, Benitha. Grey theory based evaluation of importers’ strategies for hedging the price risk in the Tanzanian oil supply chain: a focus on derivative products. International Journal of Applied Mathematical Research, [S. l.], v. 7, n. 3, p. 62–68, 2018. DOI: 10.14419/ijamr.v7i3.12196. Disponível em: https://sciencepubco.com/index.php/ijamr/article/view/12196.. Acesso em: 2 may. 2024.