Dan Li, Zhenlong Zhang, and Zongguang Liu. “Some Characterizations of Campanato Spaces via the Commutator of Fractional Integral Operator”. Jordan Journal of Mathematics and Statistics 10, no. 3 (May 18, 2025): 199–215. Accessed October 3, 2025. https://jjms.yu.edu.jo/index.php/jjms/article/view/992.