Ralph Ernest Powers (Portuguese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ralph Ernest Powers" in Portuguese language version.

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doi.org

R. E. Powers (1911). «The Tenth Perfect Number». American Mathematical Monthly. 18: 195–7. JSTOR 2972574. doi:10.2307/2972574. The article is signed "DENVER, COLORADO, June, 1911"
R. E. Powers (1934). «Note on a Mersenne Number». Bulletin of the American Mathematical Society. 40: 883. doi:10.1090/s0002-9904-1934-05994-9

R. E. Powers (1911). «The Tenth Perfect Number». American Mathematical Monthly. 18: 195–7. JSTOR 2972574. doi:10.2307/2972574. The article is signed "DENVER, COLORADO, June, 1911"

http://plms.oxfordjournals.org/content/s2-13/1/1.1.full.pdf Proc. London Math. Soc. (1914) s2–13 (1): 1. Result presented at a meeting with London Mathematical Society on June 11, 1914. Retrieved 2016-04-17.