A Comparison of the Business Object Notation and the Unified Modeling Language: A 1999 technical report by Richard F. Paige and Jonathan S. Ostroff. Available in Postscript and PDF format.
An Introduction to BON: Brief, very clear document treats main ideas; text, diagrams, bibliography.
BON Method: Treats many aspects of BON: overview, reversibility, contracts, book, BONsai diagram tool; by Kim Waldén, one of BON co-inventors.
Seamless Object-Oriented Software Architecture: Analysis and Design of Reliable Systems: By Kim Waldén, Jean-Marc Nerson; Prentice Hall, 1994, ISBN 0130313033. In development, OO methods stand out in promise for code reuse and making program analysis, design, implementation a seamless process. Free download file, PDF.
The BON Analysis and Design Method: BON: The analysis and design method for reliability, reusabilility and reversibility.