Rabinovich, E. B. Inductive limits of symmetric groups and universal groups. (Russian) Zbl 0497.20011 Izv. Akad. Nauk BSSR, Ser. Fiz.-Mat. Nauk 1981, No. 5, 39-42 (1981). MSC: 20E07 20B07 20A15 03E50 PDFBibTeX XMLCite \textit{E. B. Rabinovich}, Izv. Akad. Nauk BSSR, Ser. Fiz.-Mat. Nauk 1981, No. 5, 39--42 (1981; Zbl 0497.20011)
Ngo Dak Tan On minimal transitive permutation groups on a countable set. (Russian) Zbl 0405.20003 Izv. Akad. Nauk BSSR, Ser. Fiz.-Mat. Nauk 1979, No. 1, 12-18 (1979). MSC: 20B07 20E15 20B20 PDFBibTeX XMLCite \textit{Ngo Dak Tan}, Izv. Akad. Nauk BSSR, Ser. Fiz.-Mat. Nauk 1979, No. 1, 12--18 (1979; Zbl 0405.20003)