@electronic{www.ganttproject.biz,
   title       = {Download GanttProject}, 
   url         = {http://www.ganttproject.biz/download},
   biburl      = {https://puma.uni-kassel.de/url/5795dfb9db3d620d910f2ecf2d481d57/benz},
   keywords    = {gantt gantt_chart project project_management software},
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}

@electronic{retrospectiva.org,
   title       = {Retrospectiva / Smarter Project Management}, 
   url         = {http://retrospectiva.org/overview},
   biburl      = {https://puma.uni-kassel.de/url/f84a0087b86bb4093a387653f455a4b0/benz},
   keywords    = {management project project_management retrospectiva software software_development tickets},
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   description = {Open-source project management tool, intended to assist the collaborative aspect of work carried out by agile software development teams. },
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   intrahash   = {f84a0087b86bb4093a387653f455a4b0}
}

@electronic{www.redmine.org,
   title       = {Redmine - Overview - Redmine}, 
   url         = {http://www.redmine.org/},
   biburl      = {https://puma.uni-kassel.de/url/6705d40a50bc3ad596c1e6888e613bc4/benz},
   keywords    = {project_management redmine software},
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