@electronic{www.ultrastar.pl,
   title       = {UltraStar official website}, 
   url         = {http://www.ultrastar.pl/},
   biburl      = {https://puma.uni-kassel.de/url/8a5b3e198543f1d7f7ec8f9dfbb2839b/hotho},
   keywords    = {computer ps2 singstar ultrastar},
   added-at    = {2009-12-29T14:02:51.000+0100},
   description = {},
   interhash   = {8a5b3e198543f1d7f7ec8f9dfbb2839b}, 
   intrahash   = {8a5b3e198543f1d7f7ec8f9dfbb2839b}
}