Moghani, Z. N. ., Mohammadzadeh Karizaki, M. ., & Khanehgir, M. (2021). Solutions of Sylvester equation in $C^*$-modular operators. Ukrains’kyi Matematychnyi Zhurnal, 73(3), 354-369. https://doi.org/10.37863/umzh.v73i3.152