MoghaniZ. Niazi, Mohammadzadeh KarizakiM., and KhanehgirM. “Solutions of Sylvester Equation in $C^*$-Modular Operators”. Ukrains’kyi Matematychnyi Zhurnal 73, no. 3 (March 11, 2021): 354 - 369. Accessed December 4, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/152.