CHEN, H.; XU, W. Lacunary series and QK spaces on the unit ball. Annales Fennici Mathematici, [S. l.], v. 35, n. 1, p. 47–57, 2010. DOI: 10.5186/aasfm.2010.3503. Disponível em: https://afm.journal.fi/article/view/135293. Acesso em: 27 apr. 2025.