Sticla lui Klein (Romanian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Sticla lui Klein" in Romanian language version.

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books.google.com

  • en Bonahon, Francis (). Low-dimensional geometry: from Euclidean surfaces to hyperbolic knots. AMS Bookstore. p. 95. ISBN 978-0-8218-4816-6. 
  • en David Darling (). The Universal Book of Mathematics: From Abracadabra to Zeno's Paradoxes. John Wiley & Sons. p. 176. ISBN 978-0-471-27047-8. 

magiccorporation.com

sciencemuseum.org.uk

web.archive.org