Marcal, E., e P. Pereira. Evaluating the Existence of Structural Change in the Brazilian Term Structure of Interest Rate: Evidence Based on Hansens Cointegration Models With Structural Break. São Paulo Journal of Mathematical Sciences, Vol. 8, nº 2, Dec. 2014, p. 211-39, doi:10.11606/issn.2316-9028.v8i2p211-239.