Gold Investments – Regression Analysis of the Gold Price Over a Certain Period. Научни трудове на УНСС, [S. l.], v. 5, p. 137–145, 2023. DOI: 10.37075/RP.2022.5.05. Disponível em: https://ojs.e-dnrs.org/rpunwe/article/view/275. Acesso em: 6 dec. 2025.