KOPALIANI, T. S. Littlewood - Paley theorem on $L^{p(t)}(\mathbb{R}^n)$ spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 60, n. 12, p. 1709 – 1715, 2008. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3283. Acesso em: 5 dec. 2025.