This article is from the FAQ, by with numerous contributions by others.
The ultimate source of information on the BETA language is:
Ole Lehrmann Madsen, Birger Moller-Pedersen, Kristen Nygaard:
"Object-Oriented Programming in the BETA Programming Language"
Addison-Wesley and ACM Press, 1993
ISBN 0-201-62430-3
An german introduction to BETA can be found in the book:
Ernst Erich Doberkat, Stefan Dißmann:
"Einführung in die objectkorientierte Programmierung mit BETA"
Addison-Wesley-Longman, 1996
ISBN 3-8273-1026-1
The Mjolner System and the BETA language is also extensively described in
the book:
Jorgen Lindskov Knudsen, Mats Lofgren, Ole Lehrmann Madsen, Boris
Magnusson (eds.):
"Object-Oriented Environments: The Mjolner Approach"
Prentice-Hall, 1993
ISBN 0-13-009291-6
 
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