@electronic{www.projectpier.org,
   title       = {ProjectPier.org}, 
   url         = {http://www.projectpier.org/},
   biburl      = {https://puma.uni-kassel.de/url/9268abc4ce708b747d272b7f20eb1d92/benz},
   keywords    = {project projectpier projektmanagement tool},
   added-at    = {2011-02-04T16:08:04.000+0100},
   description = {},
   interhash   = {9268abc4ce708b747d272b7f20eb1d92}, 
   intrahash   = {9268abc4ce708b747d272b7f20eb1d92}
}

@electronic{www.planzone.com,
   title       = {Online Project Management Software | Planzone}, 
   url         = {http://www.planzone.com/},
   biburl      = {https://puma.uni-kassel.de/url/954189b9306c780a59cbd2074c10ac86/benz},
   keywords    = {projekt projektmanagement tool wintersause},
   added-at    = {2011-02-04T16:08:03.000+0100},
   description = {},
   interhash   = {954189b9306c780a59cbd2074c10ac86}, 
   intrahash   = {954189b9306c780a59cbd2074c10ac86}
}