Біцентричний многокутник (Ukrainian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Біцентричний многокутник" in Ukrainian language version.

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Gorini, Catherine A. (2009), The Facts on File Geometry Handbook, Infobase Publishing, с. 17, ISBN 9780816073894.
Reiman, István (2005), International Mathematical Olympiad: 1976-1990, Anthem Press, с. 170—171, ISBN 9781843312000.
Davison, Charles (1915), Subjects for mathematical essays, Macmillan and co., limited, с. 98.
Dörrie, Heinrich (1965), 100 Great Problems of Elementary Mathematics: Their History and Solution, Courier Dover Publications, с. 192, ISBN 9780486613482.

Weisstein, Eric W. «Poncelet's Porism.» From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/PonceletsPorism.html