http://www.mathematik.tu-darmstadt.de:8080/Math-Net/Lehrveranstaltungen/Lehrmaterial/SS2005/DarGeoII/skript1-78.pdf
(Geometrie für Architekten!)
http://www.uni-ak.ac.at/geom/buecher.php (Autor von Amiga Sprinter etc.)
http://www.cprogramming.com/tutorial/tut3.html
find . -path '*/CVS/Root' | while read f ; do echo $CVSROOT >$f ; done
find -name "*.py" | sed "s/peddi2'\,/peddi3',''/w out.txt" *.py > out.py