Pinheiro, Alusio, e Pranab Kumar Sen. “Quasi U-Statistics of Innite Order and Applications to the Subgroup Decomposition of Some Diversity Measures”. São Paulo Journal of Mathematical Sciences 8, no. 2 (dezembro 12, 2014): 285-309. Acessado março 20, 2023. https://www.revistas.usp.br/spjournal/article/view/98892.