單連通 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "單連通" in Chinese language version.

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encyclopediaofmath.org

James, R. Munkres. Ch. 9. Topology (2nd Edition) 2nd ed. Upper Saddle River, NJ: Prentice Hall, Inc. January 7. ISBN 0131816292. OCLC 42683260 （英语）. 请检查|date=中的日期值 (帮助)
Ronald,, Brown,. Topology and Groupoids.. Academic Search Complete. North Charleston: CreateSpace. June 2006. ISBN 1419627228. OCLC 712629429 （英语）.
Colin, Adams; Robert, Franzosa; 沈以淡. 第9章同伦与度理论. 拓扑学基础及应用. 北京: 机械工业出版社. 2010年4月1日. ISBN 9787111288091. OCLC 644064114 （中文）.