\newcommand{\etalchar}[1]{$^{#1}$}
\begin{thebibliography}{BDG{\etalchar{+}}88}

\bibitem[BDG{\etalchar{+}}88]{clos:bobrow-88}
D.G. Bobrow, L.G. DeMichiel, R.P. Gabriel, S.E. Keene, G.~Kiczales, and D.A.
  Moon.
\newblock {Common Lisp Object System Specification}.
\newblock {\em SIGPLAN Notices}, 23, September 1988.

\bibitem[HB77]{hewitt:law}
Carl Hewitt and H.~Baker.
\newblock Laws for communicating parallel processes.
\newblock In {\em IFIP Congress Proceedings}, pages 987--992. IFIP
  (International Federation for Information Processing), August 1977.

\bibitem[JF88]{johnson-foote:rules}
Ralph~E. Johnson and Brian Foote.
\newblock Designing reusable classes.
\newblock {\em Journal of Object-Oriented Programming}, 1(2):22--35, June/July
  1988.

\bibitem[LHR88]{LHLR:law-paper}
Karl~J. Lieberherr, Ian Holland, and Arthur~J. Riel.
\newblock Object-oriented programming: An objective sense of style.
\newblock In {\em Object-Oriented Programming Systems, Languages and
  Applications Conference, {\em in} Special Issue of SIGPLAN Notices},
  number~11, pages 323--334, San Diego, CA, September 1988.
\newblock A short version of this paper appears in {\em IEEE Computer
  Magazine}, June 1988, Open Channel section, pages 78-79.

\bibitem[Lie88]{karl1:class}
Karl~J. Lieberherr.
\newblock Object-oriented programming with class dictionaries.
\newblock {\em Journal on Lisp and Symbolic Computation}, 1(2):185--212, 1988.

\bibitem[Lie96]{karl:demeter}
Karl~J. Lieberherr.
\newblock {\em Adaptive Object-Oriented Software: The Demeter Method with
  Propagation Patterns}.
\newblock PWS Publishing Company, Boston, 1996.
\newblock 616 pages, ISBN 0-534-94602-X, entire book at
  www.ccs.neu.edu/research/demeter.

\bibitem[LR88]{lieber-riel:oop}
Karl~J. Lieberherr and Arthur~J. Riel.
\newblock Demeter: A {CASE} study of software growth through parameterized
  classes.
\newblock {\em Journal of Object-Oriented Programming}, 1(3):8--22, August,
  September 1988.
\newblock A shorter version of this paper was presented at the {\em 10th
  International Conference on Software Engineering, Singapore, April 1988, IEEE
  Press}, pages 254-264.

\bibitem[Mey88]{meyer:book-88}
Bertrand Meyer.
\newblock {\em Object-Oriented Software Construction}.
\newblock Series in Computer Science. Prentice-Hall International, 1988.

\bibitem[MN88]{madsen-norgard:hicss-88}
Ole~Lehrmann Madsen and Claus N{\o}rgaard.
\newblock An object-oriented metaprogramming system.
\newblock In {\em Proceedings of the Annual Hawaii International Conference on
  System Sciences}, pages 406--415, 1988.

\bibitem[Sak88]{sakkinen:law-88}
Markku Sakkinen.
\newblock Comments on the {Law of Demeter} and {C++}.
\newblock {\em SIGPLAN Notices}, 23(12):38--44, December 1988.

\bibitem[Smi88]{smith:principles}
Connie~U. Smith.
\newblock Applying synthesis principles to create responsive software systems.
\newblock {\em IEEE Transactions on Software Engineering}, 14(10):1394--1408,
  Oct. 88 1988.

\bibitem[Str86]{stroustrup:c++}
B.~Stroustrup.
\newblock {\em The C++ Programming Language}.
\newblock Addison-Wesley, 1986.

\bibitem[Weg88]{wegner:concept}
Peter Wegner.
\newblock Object-oriented concept hierarchies.
\newblock presented at CASE 88 in Cambridge, MA., July 1988.

\bibitem[Wir77]{wirth:ebnf}
Niklaus Wirth.
\newblock What can we do about the unnecessary diversity of notation for
  syntactic definitions?
\newblock {\em Communications of the ACM}, 20(11):822--823, 1977.

\end{thebibliography}