Wikipedia: de.wikipedia.or ... https://de.wikipedia.org/wiki/Amino_Acids
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Wikipedia: de.wikipedia.or ... https://de.wikipedia.org/wiki/Amino_Acids
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q15757015
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Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%220939-4451%22
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Pubmed: pubmed.ncbi.nlm ... https://pubmed.ncbi.nlm.nih.gov/?term=%220939-4451%22%5BJournal%5D&sort=
