homepages/98/5920,
Federal University of Piauí, Picos, Brazil, Carlos Brito and Carlos Fisch Brito and Carlos Eduardo Fisch de Brito, Home Page, https://orcid.org/0000-0001-9246-7414
homepages/98/10657-5,
University of Finance and Economics, Laboratory for Financial Intelligence and Financial Engineering, Chengdu, China, Chuan Luo, Home Page, https://dids.swufe.edu.cn/info/1437/2109.htm