@electronic{www.st.ewi.tudelft.nl,
   title       = {Confy's Computer Science Conference Calendar and Call for Papers | Home}, 
   url         = {http://www.st.ewi.tudelft.nl/~mathijs/conf/},
   biburl      = {https://puma.uni-kassel.de/url/48617e8e387fbc488ef497a763499366/stumme},
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@electronic{www.dspace.org,
   title       = {CALL: Open Repositories 2010 in Madrid}, 
   url         = {http://www.dspace.org/CALL-Open-Repositories-2010-in-Madrid.html},
   biburl      = {https://puma.uni-kassel.de/url/42e322c3e82f4a1aa205f07d04ab302c/stumme},
   keywords    = {2010 call madrid open puma repositories},
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