Kim, S. G.; Lee, C. Y. The Numerical Radius Points of ${\mathcal L}(^2~ \ell^2_{{({\infty}, \theta)}}: \ell^2_{{({\infty}, \theta)}})$. MFAT 2023, 29 (3-4), 101-110. https://doi.org/https://doi.org/10.31392/MFAT-npu26_3–4.2023.03.