On contraction and the modal fragment

TitleOn contraction and the modal fragment
Publication TypeJournal Article
Year of Publication2008
AuthorsBrünnler, K, Probst, D, Studer, T
JournalMathematical Logic Quarterly
Volume54
Pagination345-349
URLhttp://www.iam.unibe.ch/ltgpub/2008/bps08.pdf