PINHEIRO, A.; SEN, P. K. Quasi U-statistics of innite order and applications to the subgroup decomposition of some diversity measures. São Paulo Journal of Mathematical Sciences, [S. l.], v. 8, n. 2, p. 285-309, 2014. DOI: 10.11606/issn.2316-9028.v8i2p285-309. Disponível em: https://www.revistas.usp.br/spjournal/article/view/98892. Acesso em: 26 set. 2021.