@electronic{www.matheboard.de,
   title       = {Eigene math. Operatoren}, 
   url         = {http://www.matheboard.de/archive/10096/thread.html},
   biburl      = {https://puma.uni-kassel.de/url/cc03021f5a0e0d1d1dc6d036f2ea28e1/stephandoerfel},
   keywords    = {DeclareMathOperator index latex math mathoperator operator tip tipp tipps tool tutorial},
   added-at    = {2011-01-26T17:07:29.000+0100},
   description = {Hilfe zu Eigene math. Operatoren .},
   interhash   = {cc03021f5a0e0d1d1dc6d036f2ea28e1}, 
   intrahash   = {cc03021f5a0e0d1d1dc6d036f2ea28e1}
}