SILVAPULLE, P. Testing for seasonal fractional integration in quarterly time series. Statistica, [S. l.], v. 62, n. 4, p. 633–646, 2002. DOI: 10.6092/issn.1973-2201/431. Disponível em: https://rivista-statistica.unibo.it/article/view/431. Acesso em: 27 apr. 2024.