LI, S.; WULAN, H. Derivative-Free Characterizations of $Q_K$ Spaces II. Sarajevo Journal of Mathematics, [S. l.], v. 2, n. 1, p. 63–71, 2024. DOI: 10.5644/SJM.02.1.07. Disponível em: https://sjm.anubih.ba/index.php/sjm/article/view/429. Acesso em: 15 oct. 2024.