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  99 Points of Intersection: Examples-Pictures-Proofs - Hans Walser - Google Books

  http://books.google.de/books?id=u3AtON8yHhYC&pg=PA135&dq=karl+friedrich+jacobi+1795+1855&hl=de&ei=Gn7gTr2DC9LS4QT2wvmTBw&sa=X&oi

  Translated from the original German by Peter Hilton and Jean Pedersen. The 99 points of intersection presented here were collected during a year-long search for surprising concurrence of lines. For each example we find compelling evidence for the sometimes…

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  A Textbook Of Analytical Geometry Of Two Dimensions - Jain, P.K. - Google Books

  http://books.google.de/books/about/A_Textbook_Of_Analytical_Geometry_Of_Two.html?id=Jigc2qGYqxAC&redir_esc=y

  Keine Beschreibung vorhanden.

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  Prof. Dr. Rolf Schneider, Mathematisches Institut, Universität Freiburg

  http://home.mathematik.uni-freiburg.de/rschnei/

  Keine Beschreibung vorhanden.

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  Category:Geometry – Wikimedia Commons

  https://commons.wikimedia.org/wiki/Category:Geometry?uselang=de

  Keine Beschreibung vorhanden.

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