With this function, the resolver checks all associated URLs and marks them either with a green tick or, in the event of an error, with a red cross. Users are redirected to the first URL marked in green.

Analyse	urn:nbn:de:hebis:30:3-628477
	http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62847 STATUS : 429 → Skipping : http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/62847
	http://publikationen.ub.uni-frankfurt.de/files/62847/PhysRevD_93_074022.pdf STATUS : 429 → Skipping : http://publikationen.ub.uni-frankfurt.de/files/62847/PhysRevD_93_074022.pdf
	https://d-nb.info/1353017281/34 STATUS : 404 → Skipping : https://d-nb.info/1353017281/34

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