R. B. Beshimov, R. M. Juraev, “Cardinal and topological properties of the space of symmetric degree”, Itogi Nauki i Tekhniki. Sovrem. Mat. Pril. Temat. Obz., 201 (2021), 107–122
2.
R. B. Beshimov, R. M. Juraev, “Topological properties of the space of $G$-symmetric degree”, Itogi Nauki i Tekhniki. Sovrem. Mat. Pril. Temat. Obz., 197 (2021), 78–87