When a reference is a one-to-one account of a document, then the year in the reference (ref.year) is the year of publication of the document. This relation captures this relationship.
(Same-Slot-Values Inherits-Year-From-Document Ref.Year (Compose Timepoint.Year Doc.Publication-Date Ref.Document)) (<=> (Inherits-Year-From-Document ?Ref) (And (Publication-Reference ?Ref) (Same-Values ?Ref Ref.Year (Compose Timepoint.Year Doc.Publication-Date Ref.Document))))