The search engine for searching and analyzing text reuse clusters in the Swedish-language press from 1645 to 1918 covers material from Finland, Sweden, and also the United States. The search engine is offered by the Society of Swedish Literature in Finland (SLS).
Find here the Guidelines for using the search engine.
This resource group page has a Persistent Identifier: http://urn.fi/urn:nbn:fi:lb-2021101302