Publons is a platform for academics where they can list their publications and reviews.
They have a database of journals and publishers which can be aligned to Wikidata via the properties Publons journal/conference ID (P7461) and Publons publisher ID (P7403).
A TSV version of their 1,000 most popular journals is available here:
http://pintoch.ulminfo.fr/47ae2ed114/publons_journals.tsv
(you can also try scraping that directly from their website if you want!)
Importing these ids (both for journals and publishers) would be a good OpenRefine exercise.