Monetary variables and the formation of speculative bubble: a frequency synchronization analysis (1992-2013). Panorama Económico, [S. l.], v. 12, n. 24, p. 1–18, 2017. DOI: 10.29201/peipn.v12i24.390. Disponível em: https://www.revistapanoramaeconomico.mx/index.php/PE/article/view/390. Acesso em: 20 mar. 2026.