@electronic{www.opensense.ethz.ch,
   title       = {Public/Publications – OpenSense}, 
   url         = {http://www.opensense.ethz.ch/trac/wiki/Public/Publications},
   biburl      = {https://puma.uni-kassel.de/url/380853fdfe6e994aa17822289f47a581/hotho},
   keywords    = {air airpollution everyaware opensense project quality urban},
   added-at    = {2014-11-12T09:14:02.000+0100},
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@electronic{www.tk.informatik.tu-darmstadt.de,
   title       = {Noisemap}, 
   url         = {http://www.tk.informatik.tu-darmstadt.de/en/research/smart-urban-networks/noisemap/},
   biburl      = {https://puma.uni-kassel.de/url/6ca37b7a2e23690893e73bee15653f2a/hotho},
   keywords    = {everyaware noise noisemap sensing urban},
   added-at    = {2013-07-15T14:52:59.000+0200},
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