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Wikipedia: de.wikipedia.or ... https://de.wikipedia.org/wiki/European_Heart_Journal
Wikipedia: en.wikipedia.or ... https://en.wikipedia.org/wiki/European_Heart_Journal
Wikipedia: nl.wikipedia.or ... https://nl.wikipedia.org/wiki/European_Heart_Journal
Wikipedia: pl.wikipedia.or ... https://pl.wikipedia.org/wiki/European_Heart_Journal
SUDOC: www.sudoc.fr/03 ... http://www.sudoc.fr/039150194
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q2286839
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Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%220195-668X%22
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