1. Simon Karfinkel and Michael Mahoney, “NeXTstep Programming Step One: object-Oriented Application”, Springer-Verlag, 1993.
2. Lynn Andrea, “Delegation Is Inheritance”, OOPSLA'87.
3. “ObjectVision 2 Reference Guide”, Borland International Inc., copy right 1991.
4. Yuzuru Tanaka, “Intelligent Pad”, Japan Computer Quarterly, 1993, No. 92.
5. Sam S. Adams, “Meta Methods: The MVC Paradigm”, HOOPLA, July 1988.