Закони на Кеплер (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Закони на Кеплер" in Bulgarian language version.

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1books.google.com

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books.google.com

Holton, Gerald James. Physics, the Human Adventure: From Copernicus to Einstein and Beyond. 3. Piscataway, NJ, Rutgers University Press, 2001. ISBN 978-0-8135-2908-0. с. 40 – 41. Посетен на 27 декември 2009.

nytimes.com

After 400 Years, a Challenge to Kepler:He Fabricated His Data, Scholar Says // The New York Times, 23 януари 1990.