Wikipedia: en.wikipedia.or ... https://en.wikipedia.org/wiki/Portugaliae_Mathematica
Wikipedia: nl.wikipedia.or ... https://nl.wikipedia.org/wiki/Portugaliae_Mathematica
SUDOC: www.sudoc.fr/03 ... http://www.sudoc.fr/038775573
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q7232584
FATCAT: fatcat.wiki/con ... https://fatcat.wiki/container/sm3qqhhbzrhubammxwakq3fajq
Wikipedia: en.wikipedia.or ... https://en.wikipedia.org/wiki/Portugaliae_Mathematica
Wikipedia: nl.wikipedia.or ... https://nl.wikipedia.org/wiki/Portugaliae_Mathematica
SUDOC: www.sudoc.fr/03 ... http://www.sudoc.fr/038775573
Wikidata: www.wikidata.or ... http://www.wikidata.org/entity/Q7232584
FATCAT: fatcat.wiki/con ... https://fatcat.wiki/container/sm3qqhhbzrhubammxwakq3fajq
Google: www.google.com/ ... https://www.google.com/search?q=ISSN+%220032-5155%22
Bing: www.bing.com/se ... https://www.bing.com/search?q=ISSN+%220032-5155%22
Yahoo: search.yahoo.co ... https://search.yahoo.com/search?p=ISSN%20%220032-5155%22
CROSSREF: search.crossref ... https://search.crossref.org/?q=+0032-5155
