Kim, S. G., & Lee, C. Y. (2023). Smooth bilinear forms of ${\mathcal L}(^2\mathbb{R}_{h(w_1, w_2)}^2)$ and ${\mathcal L}(^2\mathbb{R}_{h^{’}(w_1, w_2)}^2)$. Methods of Functional Analysis and Topology, 29(1-2), 39-56. https://doi.org/https://doi.org/10.31392/MFAT-npu26_1--2.2023.04