@electronic{www.aifb.uni-karlsruhe.de,
   title       = {Ontology Engineering}, 
   url         = {http://www.aifb.uni-karlsruhe.de/WBS/cte/ontologyengineering/},
   biburl      = {https://puma.uni-kassel.de/url/278419416f79fb40c366e2451b5a2cf7/hotho},
   keywords    = {engineering ontology survey overview references},
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@electronic{www.ontologymatching.org,
   title       = {Publications}, 
   url         = {http://www.ontologymatching.org/publications.html},
   biburl      = {https://puma.uni-kassel.de/url/4ce2f1bbbf7b4d35a5174c7ba480d83c/hotho},
   keywords    = {matching ontology survey},
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