Poligon bicentric (Romanian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Poligon bicentric" in Romanian language version.

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books.google.com

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

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