(=> (= (Ref.Volume ?Ref) ?Number)
(Or (Book-Reference ?Ref)
(Book-Section-Reference ?Ref)
(Article-Reference ?Ref)))
(Subclass-Partition Publication-Reference
(Setof Book-Reference
Book-Section-Reference
Article-Reference
Proceedings-Paper-Reference
Thesis-Reference
Technical-Report-Reference
Misc-Publication-Reference))
(<=> (Edited-Book-Reference ?Ref)
(And (Book-Reference ?Ref)
(Value-Cardinality ?Ref Ref.Document 1)
(Value-Type ?Ref Ref.Document Edited-Book)
(Minimum-Value-Cardinality ?Ref Ref.Editor 1)
(Same-Values ?Ref Ref.Author Ref.Editor)))