Liu, Ya-Shing On ring-like spaces. I. (Chinese. English summary) Zbl 0091.45405 Advancement in Math. 3, 404-408 (1957). Reviewer: Sze-tsen Hu (MR 20.4268) MSC: 55P99 PDFBibTeX XMLCite \textit{Y.-S. Liu}, Advancement in Math. 3, 404--408 (1957; Zbl 0091.45405)
Komatu, Atuo; Toda, Hirosi; Nakaoka, Minoru Topology. (Isô-Kikagaku.) (Japanese) Zbl 0095.37602 Kyôritu-series on modern mathematics. Kyôritu Syuppan. 258 p. (1957). MSC: 55-01 PDFBibTeX XML