Chao Zu, Yixin Yang & Yufeng Lu. (2023). Hilbert-Schmidtness of Submodules in $H^2 (\mathbb{D}^2 )$ Containing $θ(z)−\varphi (w)$. Communications in Mathematical Research . 39 (3). 331-341. doi:10.4208/cmr.2022-0034