\begin{thebibliography}{MM91}

\bibitem[BR91]{BrRo90}
A.L. Brown and J.~Rosenberg.
\newblock Persistent Object Stores: An Implementation Technique.
\newblock In {\em Proceedings of the Fourth International Workshop on
  Persistent Object Systems, Martha's Vineyard, Massachusetts}. Morgan Kaufmann
  Publishers, January 1991.

\bibitem[Car89]{Card89}
L.~Cardelli.
\newblock Typeful Programming.
\newblock Digital Systems Research Center Reports~45, DEC SRC Palo Alto, May
  1989.

\bibitem[Car90]{Card90}
L.~Cardelli.
\newblock The Quest Language and System (Tracking Draft).
\newblock Digital systems research center, DEC SRC Palo Alto, 1990.
\newblock (shipped as part of the Quest V.12 system distribution).

\bibitem[Mat91]{Matt91b}
F.~Matthes.
\newblock Tycoon Library Manual ({\it P-Quest} Version).
\newblock DBIS Tycoon Report 102-91, Fachbereich Informatik, Universit\"at
  Hamburg, West Germany, October 1991.

\bibitem[MM91]{MaMa91}
B.~Mathiske and F.~Matthes.
\newblock The P-Quest C-Call Facility.
\newblock DBIS Tycoon Report 103-91, Fachbereich Informatik, Universit\"at
  Hamburg, West Germany, October 1991.

\end{thebibliography}