在圆柱和球坐标系中的del (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "在圆柱和球坐标系中的del" in Chinese language version.

refsWebsite

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513^th place

358^th place

1web.archive.org

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1^st place

web.archive.org

Weisstein, Eric W. (编). Convective Operator. at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc. [23 March 2011]. （原始内容存档于2016-03-03）（英语）.

wolfram.com

mathworld.wolfram.com

Weisstein, Eric W. (编). Convective Operator. at MathWorld--A Wolfram Web Resource. Wolfram Research, Inc. [23 March 2011]. （原始内容存档于2016-03-03）（英语）.