"Scheming with Objects" (1992) by KenDickey talks about the relations between objects and closures and implements YASOS (YetAnotherSchemeObjectSystem). ClosuresAndObjectsAreEquivalent.
ftp://ftp.cs.indiana.edu/pub/scheme-repository/doc/pubs/swob.txt
Scheming With Objects
last modified: April 20, 2004