Huang, Jizheng, Pengtao Li, Yu Liu, and Jie Xin. 2020. “The Characterizations of Hardy–Sobolev Spaces by Fractional Square Functions Related to Schrödinger Operators”. Annales Fennici Mathematici 45 (2):607–623. https://doi.org/10.5186/aasfm.2020.4530.