@electronic{sourceforge.net,
   title       = {PGF and TikZ Source and Manual}, 
   url         = {http://sourceforge.net/projects/pgf/files/},
   biburl      = {https://puma.uni-kassel.de/url/e78701b35da9e194d13c12e4e2c8c0de/stephandoerfel},
   keywords    = {LaTeX TikZ download graphic manual pgf program source tikz tutorial},
   added-at    = {2010-11-28T17:15:33.000+0100},
   description = {PGF and TikZ Source and Manual},
   interhash   = {e78701b35da9e194d13c12e4e2c8c0de}, 
   intrahash   = {e78701b35da9e194d13c12e4e2c8c0de}
}